WO2003063707A1 - Stethoscope including transmitting device, receiving device, and stethoscope including the receiving device - Google Patents

Stethoscope including transmitting device, receiving device, and stethoscope including the receiving device Download PDF

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Publication number
WO2003063707A1
WO2003063707A1 PCT/KR2001/001448 KR0101448W WO03063707A1 WO 2003063707 A1 WO2003063707 A1 WO 2003063707A1 KR 0101448 W KR0101448 W KR 0101448W WO 03063707 A1 WO03063707 A1 WO 03063707A1
Authority
WO
WIPO (PCT)
Prior art keywords
stethoscope
sound
internal organs
receiving device
set forth
Prior art date
Application number
PCT/KR2001/001448
Other languages
French (fr)
Inventor
Youngro Yoon
Minseok Cha
Jaewoo Shin
Original Assignee
Seon, Yeongseok
Chai, Sooho
Ahn, Byungmoo
Na, Hojin
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seon, Yeongseok, Chai, Sooho, Ahn, Byungmoo, Na, Hojin filed Critical Seon, Yeongseok
Priority to PCT/KR2001/001448 priority Critical patent/WO2003063707A1/en
Priority to AU2001282646A priority patent/AU2001282646A1/en
Publication of WO2003063707A1 publication Critical patent/WO2003063707A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B7/00—Instruments for auscultation
    • A61B7/02—Stethoscopes
    • A61B7/04—Electric stethoscopes

Definitions

  • Stethoscope including transmitting device, receiving device, and
  • the present invention relates to a stethoscope including a transmitting
  • a stethoscope including the transmitting device transmitting the sound
  • the receiving device receiving sound transmitted from the
  • a transmitting device and a stethoscope including a receiving device.
  • a stethoscope includes a chest piece of the internal organs' sound, a
  • earpiece part and a tube part connecting the detecting part and the earpiece part.
  • earpieces as moving a chestpiece on the part of the patient body.
  • the wireless stethoscope try to solve the problem of the medical people using a
  • a chestpiece resonates as pass through tube and reaches to tympanum as pressure
  • doctor in training are several, each doctor should put a stethoscope on the body of
  • the present invention provides a stethoscope
  • a earpiece which is inserted in a ears of a user, and which allow the user
  • stethoscope Using the stethoscope according to the second embodiment, it is possible to transmit user's voice and the internal organs' sound at the same time.
  • a receiving device which receives the internal organs' sound transmitted
  • a stethoscope including a transmitting device comprises a housing having a
  • the receiving device comprises a
  • housing including a connecting pipe with which the tube of stethoscope is
  • the connecting pipe is preferable to have shape of cone with a cut end to be
  • a stethoscope including the receiving
  • the stethoscope comprises a housing including the connecting
  • a receiving device including the speaker which
  • end of the tube is inserted into ear of user to allow the user to listen the internal organs' sound received.
  • Fig 1 illustrates a stethoscope according to a embodiment of the present
  • Fig 2a illustrates the transmitting device of the stethoscope with transparent
  • Fig 2b illustrates a block diagram of the transmitting device illustrated in
  • Fig 3 illustrates a performance graph of frequency response characteristics
  • Fig 4 illustrates an oblique view of receiving device into which the head of
  • Fig 5 is a front elevation view of a receiving device illustrated in Fig 4.
  • Fig 6 illustrates the receiving device illustrated in Fig 4 and Fig 5 into
  • Fig 7 illustrates the receiving device illustrated in Fig 4 and Fig 5 into
  • Fig 8 illustrates a block diagram of receiving device illustrated in Fig 5;
  • Fig 9a illustrates an example of the heart beating signal
  • Fig 9b illustrates a control signal of a heart bit indicating lamp _ passed
  • Fig 10 illustrates a stethoscope and its head according to another embodiment of the present invention
  • Fig 11 illustrates the internal side of main body into which the stethoscope
  • Fig 12 is block diagram of main body of the stethoscope illustrated in Fig
  • Fig 13 illustrates a stethoscope according to another embodiment of the
  • Fig 14 illustrates the internal side of stethoscope illustrated in Fig 13
  • Fig 15 is a block diagram of main body of the stethoscope illustrated in Fig
  • Fig 16 is a graph illustrating frequency response characteristics of a
  • Fig 17a is an example of a signal of a heart
  • Fig 17b is an example of user's voice signal
  • RF module 150 a chestpiece
  • Fig 1 illustrates a stethoscope 100 according to an embodiment of the
  • the stethoscope 100 includes an earpieces 110, an upper
  • tubel20 a transmitting devicel30, a lower tubel40 and a chestpiece 150.
  • the earpiece 110 is inserted in a ear of medical people such as a doctor and
  • the chestpiece 150 collects patient's internal organ's sound with
  • the chestpiece 150 includes low sound part collecting low
  • the stethoscope is provided with converting switch that converts mode
  • Power lampl31 indicating whether power is on or off, and battery status
  • a LED lamp is preferred for the lamp, but other type's lamp may be
  • the tube is divided into an upper tube 120 and
  • a lower tube 140 by the transmitting device 130 may be in a body.
  • the tube passes through the transmitting device 130 as illustrated in Fig 1
  • Fig 2a illustrates the inside of the transmitting device 130. As illustrated in
  • the transmitting device 130 includes a housing 200, a microphonel33, a
  • circuit platel37 a RF modulel38 and a power switchl39a.
  • the upper and the lower part of the housing 200 have openings
  • memberl34 is provided around the microphonel33
  • the noise proof member of microphone is for cutting off exterior noise
  • microphone 133 is attached to the wall of tube that penetrates transmitting device.
  • the microphonel33 is preferred to be an non directional microphone.
  • proof ring is installed is within the scope of the present invention.
  • a circuit including a RF modulel38 for wireless transmittance is printed
  • the circuit plate 137 and the microphonel33 are connected with a
  • the circuit is powered by the power supplyl39, the circuit platel37 and the
  • power supply 139 is connected by an anode snap 138a and a cathode snap 139a
  • the power supply 139 is a battery of 1.5 V and AAA size according to the
  • the transmitting devicel30 is provided with the battery housing
  • stethoscope can be used because the microphone 133 is installed at the side wall of
  • the tubel20, 140, and user of stethoscope 100 can listen to the internal organs'
  • the stethoscope 100 with the transmitting device 130 has
  • the stethoscope have the advantage thereof.
  • Fig 2b is a block diagram of the transmitting device. Accroding to Fig 2b,
  • the circuit of the transmitting device 130 comprises a microphonel33, a
  • the internal organs' sound which is collected by the chestpiece 150 and is
  • a microphone amplifier 210 amplified by a microphone amplifier 210 is passed through a filter220.
  • the organs' sound signal is transmitted as wave having UHF bandwidth of 418 or 433 MHz
  • the power of 1.5 voltage which is supplied by the power supply 139 comprising 1.5 V battery of AAA size is supplied to the circuit after it
  • indication lamp 132 is lighted on when the low batter detector 250 that input
  • Fig 3 illustrates the frequency response graph of a microphone amplifier
  • Fig 4 illustrates an oblique view of the receiving device with transparent
  • the receiving device is used by a trainee(s).
  • a trainee(s) may listen to the same sound as the
  • a traninee(s) has to listen to the same the internal organs' sound and feel as a
  • the transmitting device 130 it is necessary that the receiver receives the signal
  • the receiver according to the present invention is configured to solve above the problem.
  • the internal organs' sound can be listened to by inserting a
  • receiving device400 comprises housing400 having
  • organs' sound received from the stethoscope and which is disposed to contact with the chestpiece of head parti 50' of stethoscope inserted.
  • receiving device400 further includes contacting plate430 and the speaker440 is
  • groove460 formed on the housing410 of the receiving device400 is
  • the speaker440 is disposed to where the headl50' of the stethoscope is contacted with when the headl50' is inserted in groove460.
  • the contacting plate430 is preferred to be made of elastic material so
  • the receiving device400 may include a exterior output
  • the internal organs' sound may be
  • Fig 5 illustrates a front elevation view of the receiving device 400 from the
  • a power switch510 As illustrated in FIG 5, a power switch510, a power lamp520, and a low
  • beating indicating lamp 540 are provided with in the front part of receiving
  • device400 does not limit the scope of the present invention, and the device may be
  • Fig 6 illustrates the receiving device wherein head 150' of stethoscope
  • the switching tube 610 of stethoscope 100' is set to low sound part, and then chestpiece 620 for low sound of head 150'
  • Said chestpiece 620 sticks to the elastic head contacting plate 430 of the
  • Fig 7 illustrates a stethoscope 400' according to another embodiment of the
  • the stethoscope 400' illustrated in Fig 7 further comprises a elastic
  • the plate720 is perferred to be made of high strength material, elastic
  • means720 is preferred to be spring.
  • guide plate730 is installed to prevent the spring from being shifted
  • elastic means 710 that is, a spring is used according to Fig 7, a
  • number of spring may be used for balancing of contacting plate430' .
  • Stethoscope 400' has advantage in that inserting of stethoscope 100' s headl50' is facilitated compared to stethoscope 400
  • Fig 8 illustrates a block diagram of the circuit of receiver400, 400' circuit.
  • the circuit of the receiver400, 400' include RF receiver810,
  • one-shot860, transistor870 and the internal organs' pulsation indication LED880 are included in the one-shot860, transistor870 and the internal organs' pulsation indication LED880.
  • the internal organs' sound carried out by the transmitting device 130 is
  • the amplified internal organs' sound can be controlled by volume resistor
  • the internal organs' signal is inputted to comparator which outputs "high" signal if
  • the inputted signal is higher than reference voltage level, and the one shot860
  • Fig 9a and Fig 9b illustrate the internal organs' signal and the control
  • the pulsation of heart comprises atrium contracting signal and ventricle
  • the indicating lamp880 needs to be lighted on between atrium
  • resistors and a capacitances of the one shot 860 's circuit is adjusted so that "high"
  • Fig 10 illustrates the transmitting device 100 which is connected with the
  • the headl 110 is separated from the stethoscope 1100.
  • the second embodiment is different from above one in
  • Fig 11 illustrates internal structure of receiving device 1000 and show how
  • the tube connects with the receiving device 1000 of stethoscope 1100.
  • the receiving device 1000 includes a housing 1001
  • a RF receiver 1010 receiving the internal organs' sound transmitted by a
  • connecting pipe 1040 is formed to the upper of a housing 1001.
  • the receiving devicelOOO include a power switch 1060, a power lamp
  • the speaker noise proof member 1030 is disposed to surround the speaker
  • the sound of speaker 1020 passes through the tube 1120 of stethoscope
  • the receiving device 1000 the receiving device 1000.
  • the Connecting pipe 1040 may be formed to housing 1030 in a body, or
  • housing 1030 may be formed separately and be attached to housing 1030.
  • the receiver with which the tube is connected is within the scope of
  • This stethoscope includes a housing 1001 having connecting pipe 1040 for
  • present stethoscope is the combination of the receiving device 1000 and tube of a
  • Fig 12 illustrates a block diagram of receiving device 1000 as illustrated
  • device 1000 is transformed to the internal organs' signal, which is outputted from speaker 1020 through high pass filter 1220 and audio amplifier 1240, and the
  • the volume of the internal organ' sound from the speaker 1020 is adjusted
  • volume resistor 1230 is controlled by the control of volume resistor 1230.
  • Fig 13 illustrates a transmitting device 1330 accroding to the present
  • the stethoscope illustrated in Fig 13 includes an earpiece 1310, a upper
  • the power lamp 1331 lightening when the power of transmitter 1330 is on
  • exterior microphone 1333 to collect voice of the stethoscope 1300's
  • Fig.14 illustrates internal structure of the transmitting device 1330.
  • the transmitting device 1330 include housing 1400, microphone 1333, circuit plate 1440, RF module 1450, and power supply 1460,
  • the upper and lower part of the housing 1400 has an opening which the
  • microphone noise proof member 1480 is provided. According to the present invention, microphone noise proof member 1480
  • the microphone is installed on the side wall of tube 1320, 1340
  • the microphone 1470 is a non
  • noise proof rings are installed where the upper and the lower
  • lower tube 1320, 1340 are connected with transmitting bodies to cut off exterior
  • Noise proof rings comprises an upper noise proof ring 1410 installed
  • the exterior microphone 1333 is operated when the exterior microphone
  • the transmitting device 1330 is different illustrated in Fig 13 and
  • Fig 14 is different from the transmitting device 130 illustrated in Fig 1 and Fig 2a in that the former has the exterior microphone 1333 collecting voice of human.
  • invention is a useful embodiment when it is used for educational object.
  • the educational effect is amplified when the sound of patient's internal
  • Fig 15 illustrates a block diagram of the transmitting device 1330's circuit.
  • the circuit of the transmitting device 1330 furthermore, the circuit of the transmitting device 1330 further
  • the block diagram further include a microphone
  • the circuit of exterior microphone turns on or off by the exterior
  • the receiving device for receiving the internal organs' sound for example, the receiving device for receiving the internal organs' sound and the
  • Fig 16 illustrates graph of frequency response characteristics for the
  • Fig 17a illustrates the heart's beating sound.
  • Fig 17b illustrates the
  • a user of a stethoscope including the
  • receiving device can listen to the same sound of a patent's internal organs as a user
  • This effect is useful to medical education. That is, a trainee(s) may listen to
  • the noise proof structure it has the advantage to minimize the distortion of the
  • the receiving device has the noise proof

Abstract

The present invention relates to a stethoscope including transmitting device, a receiving device and the stethoscope including the receiving device. The stethoscope including the transmitting device comprises chestpiece, earpieces, a tube connecting said earpiece and said chestpiece, and a transmitting device. The transmitting device comprises a housing having openings through which said the tube extends, a microphone collecting sound passing said tube, and means for transmitting the sound that is collected by said microphone. The tube extends inside said housing. In particular, the present invention can be used in medical education regarding diagnosis by use of stethoscope.

Description

[Specification]
[Title of invention]
Stethoscope including transmitting device, receiving device, and
stethoscope including the receiving device
[Technical field]
The present invention relates to a stethoscope including a transmitting
device, a receiving device, and a stethoscope including the receiving device, in
particular, a stethoscope including the transmitting device transmitting the sound
of the internal organs, the receiving device receiving sound transmitted from the
transmitting device, and a stethoscope including a receiving device.
[Related art]
A stethoscope includes a chest piece of the internal organs' sound, a
earpiece part, and a tube part connecting the detecting part and the earpiece part.
Medical people have to bent down and listen to the internal organs' sound through
earpieces as moving a chestpiece on the part of the patient body.
The wireless stethoscope which is disclosed in Korea Utility No. 1994-621
have been improved to overcome the disadvantage of the conventional stethoscope.
The wireless stethoscope try to solve the problem of the medical people using a
conventional stethoscope by adopting a wireless communication device instead of
a connecting tube connecting a chestpiece of internal organs' sound and a
earpieces. However, in the wireless stethoscope, the head of stethoscope should
be designed again to attach a microphone detecting the internal organs' sound on it.
Also, an additional speaker or a headphone is needed to listen to the internal organ's sound. As the above configuration has the different structure and
appearance from the conventional stethoscope, it is difficult to expect that the
medical technique and the experience of clinician will fully be worked. And
because sound listened from an exterior speaker or a headphone is different from
real sound directly from a stethoscope, it is difficult to give an exact diagnosis. In
other words, in a conventional stethoscope, the internal organs' sound collected by
a chestpiece resonates as pass through tube and reaches to tympanum as pressure
of low frequency, however, the speaker of said wireless stethoscope does not
contact on the ear, the feeling is not difficult to be transmitted to a user. When
using a headphone, sound pressure of low frequency is weak because sound is
transmitted in headphone which is not inserted, or has not resonant structure other
than a stethoscope which is fully inserted into external ear.
On the other hand, it is most basic part in medical education to diagnose
patient on the sound of internal organs such as beating of patent's heart with a
stethoscope. However, the clinical experience of an elder doctor is hard to be
transmitted to doctor in training with a conventional stethoscope. As an example,
when a elder doctor gives a diagnosis on the basis of sound listened to with a
stethoscope whose chestpiece contacts on the patent's body, there is a problem that
junior doctor in training does not know the process of the diagnosis. And when
doctor in training are several, each doctor should put a stethoscope on the body of
the patient and check the internal organs' sound to match it with the diagnosis that
the training doctor gave after listening to the patent's internal organs' sound, which
takes much time and causes the patient inconvenience. Especially taking into the consideration that education using a stethoscope has better educational effect than
education using a text or speech, above problem needs to be solved.
[Detailed description of the invention]
To solve above problem, the present invention provides a stethoscope
including a transmitting device and a receiving device that receive the transmitted
the internal organs' sound collecting by the stethoscope. Also, a stethoscope
including a receiving device is provided with.
A stethoscope including a transmitting device according to the first
embodiment of the present invention comprises
a chestpiece collecting the internal organs' sound,
a earpiece which is inserted in a ears of a user, and which allow the user
listen to the internal organs' sound collected by the chestpiece,
a tube collecting the earpiece with the chestpiece,
a housing on which an opening that the tube penetrates is formed •
a microphone sensing the internal organs' sound passing the tube after
collected by the chestpiece, and
a transmitting device the internal organs' sound sensed from the
microphone.
A stethoscope including the transmitting device according to the second
embodiment of the present invention further includes an exterior microphone
sensing user's voice and a mixer of superposing the voice sensed by the exterior
microphone and the internal organs' sound sensed by the microphone.
Using the stethoscope according to the second embodiment, it is possible to transmit user's voice and the internal organs' sound at the same time.
A receiving device which receives the internal organs' sound transmitted
form a stethoscope including a transmitting device comprises a housing having a
groove, a receiver receiving the internal organs' sound, a speaker which outputs
the internal organs' sound and is disposed as to contact with the chestpiece of
stethoscope's head.
With the receiving device, it is possible to listen to the transmitted internal
organs' sound by using a conventional stethoscope.
The receiving device according to the present invention comprises a
housing including a connecting pipe with which the tube of stethoscope is
connected, a receiver receiving the internal organs' sound, and a speaker which
outputs the internal organs' sound transmitted from the receiver and which is
disposed in the inside end of housing.
The connecting pipe is preferable to have shape of cone with a cut end to be
inserted into by tube having various sizes.
According to the present invention, a stethoscope including the receiving
device is provided. The stethoscope comprises a housing including the connecting
pipe to be connected with tube of stethoscope, receiving device receiving the
internal organs' sound transmitted, a receiving device including the speaker which
is disposed within house to be close to the inside end of connecting pipe, and
which outputs the internal organs' sound.
A tube to be connected with a connecting pipe and a earpieces disposed at
end of the tube is inserted into ear of user to allow the user to listen the internal organs' sound received.
[Brief description of the drawings]
Fig 1 illustrates a stethoscope according to a embodiment of the present
invention;
Fig 2a illustrates the transmitting device of the stethoscope with transparent
housing according to the present invention;
Fig 2b illustrates a block diagram of the transmitting device illustrated in
Fig 2a;
Fig 3 illustrates a performance graph of frequency response characteristics
of microphone amplifier according to the present invention.
Fig 4 illustrates an oblique view of receiving device into which the head of
stethoscope is inserted.
Fig 5 is a front elevation view of a receiving device illustrated in Fig 4.
Fig 6 illustrates the receiving device illustrated in Fig 4 and Fig 5 into
which the head of the stethoscope is inserted.
Fig 7 illustrates the receiving device illustrated in Fig 4 and Fig 5 into
which the head of stethoscope is inserted according to another embodiment of the
present invention.
Fig 8 illustrates a block diagram of receiving device illustrated in Fig 5;
Fig 9a illustrates an example of the heart beating signal;
Fig 9b illustrates a control signal of a heart bit indicating lamp _ passed
through heart bit indicating circuit;
Fig 10 illustrates a stethoscope and its head according to another embodiment of the present invention;
Fig 11 illustrates the internal side of main body into which the stethoscope
is inserted schematically;
Fig 12 is block diagram of main body of the stethoscope illustrated in Fig
10;
Fig 13 illustrates a stethoscope according to another embodiment of the
present invention;
Fig 14 illustrates the internal side of stethoscope illustrated in Fig 13
schematically;
Fig 15 is a block diagram of main body of the stethoscope illustrated in Fig
14;
Fig 16 is a graph illustrating frequency response characteristics of a
microphone amplifier according to an embodiment of the present invention;
Fig 17a is an example of a signal of a heart;
Fig 17b is an example of user's voice signal;
<Description of the symbols of the important part of the drawings>
100: a stethoscope
110: an earpiece
130: a transmitting device.
133: a microphone
134: a microphone noise proof member
135a, 135b: noise proof rings
138: a RF module 150: a chestpiece
400: a receiving device
430 : a contact plate
440: a speaker
450: an external output terminal
710: an elastic means
720: a supporting plate
730: a guiding plate
850: a comparator
1040: a connecting pipe
1333: an exterior microphone
[Embodiments]
The embodiment of the present invention is described with refer to
drawings.
Fig 1 illustrates a stethoscope 100 according to an embodiment of the
present invention. The stethoscope 100 includes an earpieces 110, an upper
tubel20, a transmitting devicel30, a lower tubel40 and a chestpiece 150.
The earpiece 110 is inserted in a ear of medical people such as a doctor and
allow him/her the internal organs' sound.
The chestpiece 150 collects patient's internal organ's sound with
contacting on the body of him/her.
In general, the chestpiece 150 includes low sound part collecting low
pitched sound and high sound part collecting high pitched sound. The stethoscope is provided with converting switch that converts mode
between low pitched part and high pitched part.
Power lampl31 indicating whether power is on or off, and battery status
indicating lamp displaying remaining capacity of battery for the transmitting
device are provided with on an exterior housing of the transmitting devicel30.
As illustrated in Fig 1, the power lampl31 and a battery status indicating
lamp is disposed to the front of the transmitting device, however, they can be
disposed to other places.
Also, a LED lamp is preferred for the lamp, but other type's lamp may be
used.
Also, as illustrated in Fig 1, the tube is divided into an upper tube 120 and
a lower tube 140 by the transmitting device 130, however it may be in a body.
The tube passes through the transmitting device 130 as illustrated in Fig 1
and Fig 2a. Fig 2a illustrates the inside of the transmitting device 130. As illustrated in
Fig 2a, the transmitting device 130 includes a housing 200, a microphonel33, a
circuit platel37, a RF modulel38 and a power switchl39a.
The upper and the lower part of the housing 200 have openings
respectively through which the tube of stethoscope 100 passes.
According to the present invention, it is preferred that a noise proof
memberl34 is provided around the microphonel33
The noise proof member of microphone is for cutting off exterior noise and
is preferred to be disposed as to surround microphonel33 except the inward part as illustrated in Fig 2 a
According to the preferred embodiment of the present invention, the
microphone 133 is attached to the wall of tube that penetrates transmitting device.
Also, the microphonel33 is preferred to be an non directional microphone.
And because it is necessary to cut off the exterior noise for sensing the internal
organs' sound collected by the chestpiece 150 clearly, a noise proof ring is installed
at the boundary of the upper and the lower tube 120, 140 and the housing of
transmitting device 130.
An upper noise proof ring and a lower noise proof ring are installed at the
upper and lower part of the transmitting device 130 respectively.
However, the embodiment in which one of the upper and the lower noise
proof ring is installed is within the scope of the present invention.
A circuit including a RF modulel38 for wireless transmittance is printed
on a circuit platel37.
The circuit plate 137 and the microphonel33 are connected with a
microphone connecting line 136, and the internal organs' sound collected by the
microphone 133.
The circuit is powered by the power supplyl39, the circuit platel37 and the
power supply 139 is connected by an anode snap 138a and a cathode snap 139a
The power supply 139 is a battery of 1.5 V and AAA size according to the
preferred embodiment of the present invention.
Also, the transmitting devicel30 is provided with the battery housing
where batteries can be exchanged. According to the structure of the transmitting device, a conventional
stethoscope can be used because the microphone 133 is installed at the side wall of
the tubel20, 140, and user of stethoscope 100 can listen to the internal organs'
sound which is the same as a conventional stethoscope is used.
Therefore, the stethoscope 100 with the transmitting device 130 has
functions of a wireless transmitter as well as of a conventional stethoscope,
therefore the stethoscope have the advantage thereof.
Fig 2b is a block diagram of the transmitting device. Accroding to Fig 2b,
the circuit of the transmitting device 130 comprises a microphonel33, a
microphone amplifier 210, a filter 220, and a RF transmitter 230, a DC/DC
converter 240 and low battery detector 250.
The internal organs' sound which is collected by the chestpiece 150 and is
transferred to the upper tubel20 through the lower tubel40 is collected by the
microphone installed within the transmitting devicel30. And the collected internal
organ's sound is amplified by the microphone amplifier 210 which amplifying the
sound signal collected by the microphone 133.
High frequency noise in the internal organs' sound is filtered as the sound
amplified by a microphone amplifier 210 is passed through a filter220.
The internal organs' sound in which high frequency noise is filtered is
transferred through a RF transmitting device230 and an antenna.
The organs' sound signal is transmitted as wave having UHF bandwidth of 418 or 433 MHz
In other hand, the power of 1.5 voltage which is supplied by the power supply 139 comprising 1.5 V battery of AAA size is supplied to the circuit after it
is transformed to 3.3 voltage by DC/DC converter240. The battery status
indication lamp 132 is lighted on when the low batter detector 250 that input
power becomes lower than 0.8 Voltage.
Fig 3 illustrates the frequency response graph of a microphone amplifier
according to the present invention, which has relatively constant gain in the
range of between 20 and 20,000Hz, that is, audio frequency of human. Therefore,
it is possible to tansmit the internal organs' sound without distortion in that range.
Fig 4 illustrates an oblique view of the receiving device with transparent
housing according to the present invention.
When the stethoscope according to the present invention is used for
educational field, the receiving device is used by a trainee(s).
That is, when a trainer listens to the internal organs' sound with the
stethoscope illustrated in a Fig 1 , a trainee(s) may listen to the same sound as the
trainer does.
As described below, in the above education, the most important point is
that a traninee(s) has to listen to the same the internal organs' sound and feel as a
trainer does
Though the internal organ's signal can be transmitted without distortion by
the transmitting device 130, it is necessary that the receiver receives the signal
having from low to high frequency, that is the audible range.
Then, the signal of the internal organs' sound passes a audio amplifier, the
transformation characteristics of the audio amplifier is need to be considered when the stethoscope is designed.
Further, the important thing among function of the receiver is to let a
trainee listen to the internal organs' sound feel as he/she listen to the sound
through a conventional stethoscope.
Generally, in the conventional stethoscope, the internal organs' sound
becomes resonant as it passes through a long tube and presses the eardrum of
human wearing a stethoscope with low frequency. In the other hand, it is difficult
to expect the feeling of the conventional stethoscope with general speaker or
headphone.
To solve above the problem, the receiver according to the present invention
is designed to use the conventional stethoscope.
Shortly, the internal organs' sound can be listened to by inserting a
conventional stethoscope to the receiver without distortion.
As illustrated in Fig 4, receiving device400 comprises housing400 having
groove460 to insert head partl50', and speaker440 which outputs the internal
organs' sound received from the stethoscope, and which is disposed to contact with the chestpiece of head parti 50' of stethoscope inserted.
According to the preferred embodiment of the present invention, the
receiving device400 further includes contacting plate430 and the speaker440 is
provided with on the contacting ρlate430.
Also, groove460 formed on the housing410 of the receiving device400 is
preferred to have shape of "U".
The speaker440 is disposed to where the headl50' of the stethoscope is contacted with when the headl50' is inserted in groove460.
And the contacting plate430 is preferred to be made of elastic material so
that the contacting plate430 and the chestpiece430 can stick to each other.
On the other hand, the receiving device400 may include a exterior output
terminal450, and the exterior output terminal450 transfer the internal organs'
sound received form the receiving device400 to recording device, such as
computer.
To connect the stethoscope 100' with the receiving device400, it is
preferred to insert the head of stethoscope so that the bell of the head face the
receiving device as illustrated in Fig 4. Thus, the internal organs' sound may be
transferred to the earpiece of the stethoscope 100 through a hole of the bell.
Fig 5 illustrates a front elevation view of the receiving device 400 from the
view of direction when the stethoscope 100 is inserted into.
As illustrated in FIG 5, a power switch510, a power lamp520, and a low
battery status indicating lamp530 to indicate when to exchange batteries, and heart
beating indicating lamp 540 are provided with in the front part of receiving
device400.
But, that devices are provided with in the front part of the receiving
device400 does not limit the scope of the present invention, and the device may be
provide with in the other sides such as side part of receiving part400.
Fig 6 illustrates the receiving device wherein head 150' of stethoscope
100' is inserted.
According to the present invention, the switching tube 610 of stethoscope 100' is set to low sound part, and then chestpiece 620 for low sound of head 150'
having the bell is inserted into groove 460 of receiving device 400.
Said chestpiece 620 sticks to the elastic head contacting plate 430 of the
stethoscope, therefore, the speaker 440 attached to the contacting plate430 sticking
to chestpiece for low pitched sound.
Therefore, the internal organs' sound is transferred to the tube of
stethoscope 100' from the speaker 400 without being exposed to outside, and user
such as a training doctor may listen to it.
If space is formed between chestpiece 620 for low pitched sound and head
contacting plate 430 of stethoscope, the resonance occurs in the tube of the
stethoscope 100' and the internal organ signal of low frequency is lost.
Fig 7 illustrates a stethoscope 400' according to another embodiment of the
present invention, into which a headl50' of stethoscope 100' is inserted
The stethoscope 400' illustrated in Fig 7 further comprises a elastic
means710, a supporting plate720 and a guiding plate730, which are disposed
between the elastic means710 and the guiding plate730.
The plate720 is perferred to be made of high strength material, elastic
means720 is preferred to be spring.
Also, guide plate730 is installed to prevent the spring from being shifted
when headl50' of stethoscope 100' is forced into a groove.
Though elastic means 710, that is, a spring is used according to Fig 7, a
number of spring may be used for balancing of contacting plate430' .
By having a elastic means710, Stethoscope 400' has advantage in that inserting of stethoscope 100' s headl50' is facilitated compared to stethoscope 400
illustrated in Fig 6, and contacting force between headl50' and speaker440' is
increased.
Fig 8 illustrates a block diagram of the circuit of receiver400, 400' circuit.
As illustrated in Fig 8, the circuit of the receiver400, 400' include RF receiver810,
high pass filter820, volume resistor830, audio amplifier840, and comparator850,
one-shot860, transistor870 and the internal organs' pulsation indication LED880.
The internal organs' sound carried out by the transmitting device 130 is
received by the antenna of receiver400, 400', received FM signal is transformed
into internal organs' sound, which is outputted from speaker400 after passing
through high pass filter 820 and audio amplifier 840.
The amplified internal organs' sound can be controlled by volume resistor
830.
The internal organs' signal is inputted to comparator which outputs "high" signal if
the inputted signal is higher than reference voltage level, and the one shot860
maintain the "high" signal for predetermined time to light the internal organs'
pulsation indicating LED880 by operate transistor870's base
Fig 9a and Fig 9b illustrate the internal organs' signal and the control
signal of pulsation indicating LED in case the internal organ is a heart.
The pulsation of heart comprises atrium contracting signal and ventricle
contracting signal.
Therefore, the indicating lamp880 needs to be lighted on between atrium
contraction and ventricle contraction for indicating the beat of heart. To operate indicating lamp as above, according to the present invention, a
resistors and a capacitances of the one shot 860 's circuit is adjusted so that "high"
signal occurs and is maintained for 250 ms when a atrium contracts.
Fig 10 illustrates the transmitting device 100 which is connected with the
stethoscope 100 according to the second embodiment of the present invention.
According to Fig 10, the headl 110 is separated from the stethoscope 1100.
On the other hand, the second embodiment is different from above one in
that the receiving device 1000 is connected with tube 1120 of stethoscope 1100,
not head of stethoscope 1100.
Fig 11 illustrates internal structure of receiving device 1000 and show how
the tube connects with the receiving device 1000 of stethoscope 1100.
As illustrated in Fig 11 , the receiving device 1000 includes a housing 1001
having a connecting pipe 1040 to be connected with a tube 1120 of a stethoscope
1100, a RF receiver 1010 receiving the internal organs' sound transmitted by a
transmitter of the stethoscope, a speaker which outputs the internal sound received
by the receiver and disposed closely to the end of connecting pipe in the side of a
housing 1001.
According to the preferred embodiment of the present invention, the
connecting pipe 1040 is formed to the upper of a housing 1001.
Also, the receiving devicelOOO include a power switch 1060, a power lamp
1060, a volume control switch 1070 and a speaker noise proof member 1030.
The speaker noise proof member 1030 is disposed to surround the speaker
except the lower area of opening of connecting pipe 1040 and prevents the exposure of speaker's sound.
The sound of speaker 1020 passes through the tube 1120 of stethoscope
1100, and the connecting pipe projects outside so that the tube 1120 connects to
the receiving device 1000.
The Connecting pipe 1040 may be formed to housing 1030 in a body, or
may be formed separately and be attached to housing 1030.
It is desirable to form the shape of the connecting pipe 1040 in a cone. On
the other hand, the receiver with which the tube is connected is within the scope of
the present invention.
This stethoscope includes a housing 1001 having connecting pipe 1040 for
connecting with a tube 1120 of a stethoscope 1100, a RF receiver 1010 receiving
the internal organs' sound transmitted by transmitter, a receiving device having
speaker 1020 disposed closely in the internal end of connecting pipe, The tube
1120 whose one end is connected with the connecting pipe 1040, a earpiece which
is provide with in the other end of the tube 1120 is inserted in the ear of user and
let user listen to the internal organs' sound.
Because the receiving device 10000 is explained above in detail and the
present stethoscope is the combination of the receiving device 1000 and tube of a
stethoscope, explanation in detail is shortened.
Fig 12 illustrates a block diagram of receiving device 1000 as illustrated
in Fig 10 and 11.
According to the Fig 12, FM signal received by an antenna of receiving
device 1000 is transformed to the internal organs' signal, which is outputted from speaker 1020 through high pass filter 1220 and audio amplifier 1240, and the
internal organs' signal is transmitted to the tube 1120 of stethoscope 1100, and
user may listen to the internal organs sound.
The volume of the internal organ' sound from the speaker 1020 is adjusted
by the control of volume resistor 1230.
Fig 13 illustrates a transmitting device 1330 accroding to the present
invention.
The stethoscope illustrated in Fig 13 includes an earpiece 1310, a upper
tube 1320, a lower tube 1340 and a collecting sound plate 1350.
The power lamp 1331 lightening when the power of transmitter 1330 is on,
and battery status indicating lamp 1332 lightening when remaining of charge is not
sufficient.
Also, exterior microphone 1333 to collect voice of the stethoscope 1300's
user is provided with in the transmitting device 1330.
Fig.14 illustrates internal structure of the transmitting device 1330.
according to Fig.14, the transmitting device 1330 include housing 1400, microphone 1333, circuit plate 1440, RF module 1450, and power supply 1460,
and power switch 1460a.
The upper and lower part of the housing 1400 has an opening which the
tube of stethoscope 1300 penetrate.
According to the present invention, microphone noise proof member 1480
is preferred to be provided with around microphone 1470 to prevent noise except
the internal organs' sound collected by stethoscope and passing the tube of the stethoscope from flowing into microphone.
The microphone is installed on the side wall of tube 1320, 1340
penertrating the transmitting device 1330, and the microphone noise proof member
1480 is preferred to surround microphone except the side where the microphone
faces the interior transmitting 1330.
According to the preferred embodiment, the microphone 1470 is a non
directional condenser microphone.
On the other hand, noise proof rings are installed where the upper and the
lower tube 1320, 1340 are connected with transmitting bodies to cut off exterior
noise flowing inside.
Noise proof rings comprises an upper noise proof ring 1410 installed
upside and a lower noise proof ring installed downside of the transmitting device
1330.
The exterior microphone 1333 is operated when the exterior microphone
switch 1430 is on. Noise proof member is not need to be installed in exterior
microphone, because it collects user's voice.
However, to install a noise proof member to the exterior microphone 1333
is within the scope of the present invention.
The structure of the transmitting device 1330 according to the second
embodiment is basically identified with the transmitting device 130 illustrated in
Fig l.
However, the transmitting device 1330 is different illustrated in Fig 13 and
Fig 14 is different from the transmitting device 130 illustrated in Fig 1 and Fig 2a in that the former has the exterior microphone 1333 collecting voice of human.
The stethoscope having the exterior microphone according to the present
invention is a useful embodiment when it is used for educational object.
The educational effect is amplified when the sound of patient's internal
organs and the trainer's diagnosis responding the sound are transmitted to the
trainee.
Though not for the educational object, it has useful effect to transmit the
internal organs' sound and medical opinion responding to the sound.
Fig 15 illustrates a block diagram of the transmitting device 1330's circuit.
According to the Fig 15, the circuit of the transmitting device 1330 further
includes components relevant to the exterior microphone 1333 compared to the
block diagram illustrated in Fig 2.
On the other hand, the block diagram further include a microphone
amplifier 1510, filter 1520 filtering the high frequency noise in the voice signal,
and signal mixer 1530 mixing user's voice signal passed the filter 1520 and the
internal organs' signal passing filter 220.
The circuit of exterior microphone turns on or off by the exterior
microphone switch 1430 provided with in the transmitting device 1330.
When the exterior microphone 1430 turns on, the internal organs' signal is
superposed with the human's voice and the superposed signal is transmitted by RF
transmitter 230. When the exterior microphone's switch 1430 turns off, only the
internal organ's signal is transmitted through the RF transmitter 230 and the
antenna. On the other hand, compared to the receiving device 400.1000 of above
example, the receiving device for receiving the internal organs' sound and the
human voice which collected and transmitted by the stethoscope 1300 having the
transmitting device illustrated in Fig 13 and Fig 14, has to be provided with the
separator not shown separating the received signal into the internal organs' signal
and the human's voice and speaker outputting the human voice
Fig 16 illustrates graph of frequency response characteristics for the
microphone amplifier according to the present invention, which have
approximately constant gain within 20 to 20,000 Hz, that is audio frequency range
of human. Therefore, it is possible to transmit the internal organs' sound without
distortion.
Fig 17a illustrates the heart's beating sound. Fig 17b illustrates the
human's voice collected by the exterior microphone 1333 of the stethoscope. In the
transmitting device, the internal organs' sound and human voice is mixed and the
mixed signal is transmitted.
[Industrial applicability]
According to the present invention, a user of a stethoscope including the
receiving device can listen to the same sound of a patent's internal organs as a user
of a stethoscope including the transmitting device whose chest piece contacts on
the body of patent.
This effect is useful to medical education. That is, a trainee(s) may listen to
the same internal organs' sound as a trainer listen to, which improves educational
proficiency. Also, because medical group can listen to the same organs' sound, it is
possible that medical group can make medical decision by cooperation in short
time.
Further, as the transmitting device according to the present invention has
the noise proof structure, it has the advantage to minimize the distortion of the
transmitted internal organ's sound. Also the receiving device has the noise proof
structure, it has the advantage to minimize the distortion of internal sound in the
stethoscope.

Claims

[Claims]
1. A stethoscope comprising
a chestpiece collecting the internal organs' sound
a earpieces which is inserted into user's ears and which allows the user
listen to the internal organs' sound collected from the chestpiece;
a tube connecting the earpiece;
and the chestpiece and a receiving means comprising
a housing having an opening that the tube penetrates, microphone sensing
the sound collected by the sound plate and penetrating the tube;
a transmitting means for transmitting the internal organs' sound collected
by the microphone,
2. A stethoscope as set forth in claim 1, wherein the microphone is attached to the
tube such that a sensing the internal organs' sound part of the microphone face the
inside of the tube
3. A stethoscope as set forth in claim 2, wherein a noise proof member is installed
around the microphone
4. A stethoscope as set forth in any of claim 1 through 3, wherein
a noise proof member is provided with to one of either an upper opening
and a lower opening of the housing, which the tube penetrates.
5. A stethoscope as set forth in any of claim 1 through 3, wherein further
comprises a tube penetrating the housing of the transmitting device and a noise
proof members attached to both of the upper opening and the lower opening.
6. A stethoscope as set forth in any of claim 1 through 3, wherein the transmitting device further comprises a power supply and a power lamp lighting on when the
power is on.
7. A stethoscope as set forth in claim 6, wherein the power supply is comprised of
a battery(s), and the transmitting device further comprises a battery status
indicating lamp lighting on when the voltage of the battery is lower than the
predetermined level.
8. A stethoscope as set forth in any of claim 1 through 3, wherein the transmitting
means for transmitting the internal organs' sound is a RF transmitter.
9. A receiving device for receiving the internal organs' signal transmitted by
transmitting device incorporated in a stethoscope comprising,
a housing having a groove into which the head of the stethoscope is
inserted;
a receiver receiving the internal organs' sound;
a speaker which outputs the internal organs' sound received by the receiver
and is disposed to such place that the speaker contacts on a chestpiece.
10. A receiving device as set forth in claim 9, wherein
further comprises the contacting plate contacting on the head of the
stethoscope when the head is inserted into the groove.
11. A receiving device as set forth in claim 10, wherein the contacting plate is
manufactured by elastic material.
12. A receiving device as set forth in any of claim 9 through 11, wherein further
comprise an exterior terminal outputting the internal organs' sound received by the receiving means to exterior device but speaker.
13. A receiving device as set forth in claim 10 or 11, wherein further comprise the
elastic material in the lower part of the contacting plate.
14. A receiving device as set forth in claim 11, wherein further comprises a
supporting plate disposed between the contacting plate and the elastic material.
15. A receiving device as set forth in claim 13, wherein the elastic material means
is a spring.
16. A receiving device as set forth in claim 13, wherein further comprises the
guide plate that is disposed in the side of the elastic material and prevents the
elastic material from shifting to the sides.
17. A receiving device as set forth in claim 9, wherein further comprises high pass
filter, volume resistor adjusting the volume of the internal organs' sound which
user listen to, and an audio amplifier.
18. A receiving device as set forth in claim 17, wherein further comprises a
comparator which compares the received the internal organs' signal and reference
level and outputs "high" signal if the former is higher than the later, and an
indicating lamp lightening on when the comparator outputs "high" signal.
19. A receiving device receiving the internal organs' signal transmitted by a
transmitting device comprising
a housing having a connecting pipe connected with a stethoscope's tube;
a receiver receiving the transmitted internal organs' signal; and
a speaker which outputs the internal organs' sound received by the receiver
and is disposed in the housing as to be close to internal end of the connecting pipe.
20. A receiving device as set forth in claim 19, wherein the connecting pipe has the shape of a corn with a cut end.
21. A receiving device as set forth in claim 19 or 20, wherein further comprises a
speaker noise proof member in the boundary of the speaker to cut off the exterior
noise.
22. A receiving device as set forth in claim 19 or 20, wherein the connecting pipe
is formed in a body to the housing.
23. A receiving device as set forth in claim 19 or 20, wherein further comprises a
volume control switch adjusting the volume of the internal organ' sound in the
stethoscope.
24. A stethoscope as set forth in any of claim 1 through 3, wherein the transmitting
device further comprises the exterior microphone collecting user's voice, and a
mixer superposing the voice signal collected by the exterior microphone and the
internal organs' sound collected by the microphone.
25. A stethoscope as set forth in claim 24, wherein further comprises an exterior
microphone switch turning on or off the exterior microphone.
26. A stethoscope which receives the internal organs' sound transmitted by a
transmitting device incorporated in a stethoscope comprising
a housing a having the connecting pipe with which the tube of stethoscope
connects;
a receiver receiving the transmitted internal organs' signal, the receiving
device having speaker which outputs the internal organs' sound and disposed as to
be close to the inside end of the connecting pipe;
a tube whose a end is connected with the connecting pipe; and an earpieces which is inserted in a ears of user and allows user to listen to
the internal organs' sound.
27. A stethoscope as set.forth in of claim 26, wherein the connecting pipe has
shape of a com with cut end
28. A stethoscope as set forth in of claim 26 or 27, wherein a speaker noise proof
member is disposed around speaker to cut off exterior noise.
29. A receiving device receiving human's voice and the internal organs' sound
transmitted by a transmitting device incorporated a stethoscope comprising,
a housing having a groove into which a head of the stethoscope;
a receiver receiving the internal organs' sound and human's voice;
a separator separating it the internal organs' sound and human's voice
individually;
a speaker which output the received the internal organs 's sound and
disposed as to contact the chestpiece; and
an exterior speaker outputting human's voice.
30. A receiving device receiving the internal organs' sound and a human's voice
transmitted by a transmitting device comprising,
a housing having a connecting pipe with which a tube of a stethoscope;
a receiver receiving the internal organs' sound and the human voice;
a separator separating the internal organs' sound and the human voice
individually;
a speaker which outputs the received internal organs' sound and is disposed
to the inside end of the connecting pipe; and an exterior speaker outputting the human voice.
31. A stethoscope receiving the internal organs' sound and a human voice
transmitted by a transmitting device incorporated to a stethoscope comprising,
the receiving device comprising a housing having a connecting pipe with
which a tube of the stethoscope connects, a receiving device the transmitted
internal organs' sound and the human voice, a separator separating the received
internal organs' sound and the human voice individually, a speaker which outputs
the received internal organs' sound and disposed to be close to the internal end of
the connecting pipe, and a exterior speaker outputting the human voice;
a tube whose end connects with the connecting pipe; and
an earpieces which is provided with at the other end of the tube and is
inserted into ears of a user to allow him/her to listen the internal organs' sound.
PCT/KR2001/001448 2001-08-28 2001-08-28 Stethoscope including transmitting device, receiving device, and stethoscope including the receiving device WO2003063707A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/KR2001/001448 WO2003063707A1 (en) 2001-08-28 2001-08-28 Stethoscope including transmitting device, receiving device, and stethoscope including the receiving device
AU2001282646A AU2001282646A1 (en) 2001-08-28 2001-08-28 Stethoscope including transmitting device, receiving device, and stethoscope including the receiving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2001/001448 WO2003063707A1 (en) 2001-08-28 2001-08-28 Stethoscope including transmitting device, receiving device, and stethoscope including the receiving device

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Cited By (6)

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US8870791B2 (en) 2006-03-23 2014-10-28 Michael E. Sabatino Apparatus for acquiring, processing and transmitting physiological sounds
ITUB20151919A1 (en) * 2015-07-07 2017-01-07 Arcon Srls DEVICE FOR DIGITALIZING THE SOUND OF A STETHOSCOPE AND SEND IT TO AN ELECTRONIC INSTRUMENT
DE102017002293A1 (en) 2017-03-10 2018-09-13 Minebea Mitsumi Inc. Noise measuring device for measuring noises on a test object
IT201800005326A1 (en) * 2018-05-14 2019-11-14 System for digitizing the sound of a stethoscope and sending it to an electronic instrument
US11386807B2 (en) * 2017-06-26 2022-07-12 Boorpus, LLC Stethoscope chest piece holder
WO2022200947A1 (en) * 2021-03-24 2022-09-29 3M Innovative Properties Company Modular stethoscope

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US4528690A (en) * 1984-03-12 1985-07-09 Genovation, Inc. Compact hybrid stethoscope
EP0295318A1 (en) * 1987-06-18 1988-12-21 Ming-Jeng Shue Electronic stethoscopic apparatus
KR970005241A (en) * 1995-07-26 1997-02-19 장택희 Electronic stethoscope
JPH09238938A (en) * 1996-03-08 1997-09-16 Hitachi Ltd Remotely diagnostic apparatus
KR20010097170A (en) * 2000-04-20 2001-11-08 서정주 An Electronic Stethoscope

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8870791B2 (en) 2006-03-23 2014-10-28 Michael E. Sabatino Apparatus for acquiring, processing and transmitting physiological sounds
US8920343B2 (en) 2006-03-23 2014-12-30 Michael Edward Sabatino Apparatus for acquiring and processing of physiological auditory signals
US11357471B2 (en) 2006-03-23 2022-06-14 Michael E. Sabatino Acquiring and processing acoustic energy emitted by at least one organ in a biological system
ITUB20151919A1 (en) * 2015-07-07 2017-01-07 Arcon Srls DEVICE FOR DIGITALIZING THE SOUND OF A STETHOSCOPE AND SEND IT TO AN ELECTRONIC INSTRUMENT
WO2017006258A1 (en) 2015-07-07 2017-01-12 Arcon Srls A device for digitizing the sound of a stethoscope and sending it to an electronic instrument
US10271815B2 (en) 2015-07-07 2019-04-30 Arcon Srls Device for digitizing the sound of a stethoscope and sending it to an electronic instrument
DE102017002293A1 (en) 2017-03-10 2018-09-13 Minebea Mitsumi Inc. Noise measuring device for measuring noises on a test object
US11386807B2 (en) * 2017-06-26 2022-07-12 Boorpus, LLC Stethoscope chest piece holder
IT201800005326A1 (en) * 2018-05-14 2019-11-14 System for digitizing the sound of a stethoscope and sending it to an electronic instrument
WO2019220316A1 (en) * 2018-05-14 2019-11-21 Arcon Srls System for digitizing the sound of a stethoscope and for sending it to an electronic instrument
WO2022200947A1 (en) * 2021-03-24 2022-09-29 3M Innovative Properties Company Modular stethoscope

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