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JP2017176576

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DESCRIPTION JP2017176576
Abstract: PROBLEM TO BE SOLVED: To reduce a user's discomfort caused by frequency
characteristics of a stethoscope. A living body sound acquiring device (1, 2) is a converter (11)
for acquiring a living body sound of a subject and converting it into an electric signal, and a
plurality of frequency characteristics of each of a plurality of other living body sound acquiring
devices And a signal processing unit (12) that generates an output signal by changing the
frequency characteristic of the electrical signal based on the frequency characteristic indicated
by one of the frequency characteristic information of the above. [Selected figure] Figure 1
Body sound acquisition device
[0001]
The present invention relates to the technical field of a body sound acquisition apparatus such as
an electronic stethoscope.
[0002]
As this type of device, for example, body sound data indicating the body sound of the subject
collected by the sound collection unit, and additional information (for example, time information)
which is information for specifying the subject that can be measured by the measuring unit An
apparatus for transmitting data has been proposed (see Patent Document 1).
[0003]
Unexamined-Japanese-Patent No. 2015-29646
07-05-2019
1
[0004]
In the technology described in Patent Document 1, depending on the reproduction environment
(for example, the characteristics of a speaker or a headphone, etc.) of biological sound data
collected by an electronic stethoscope as a biological sound collection device, the reproduced
biological sound is Unlike the sound heard through so-called analog stethoscopes, there is a
technical problem that the user may feel uncomfortable.
[0005]
The present invention has been made in view of, for example, the above-mentioned problems,
and an object of the present invention is to provide a living body sound acquiring apparatus
capable of reducing a user's discomfort.
[0006]
The living body sound acquiring apparatus according to the present invention, in order to solve
the above-mentioned problems, includes a converter for acquiring a living body sound of a
subject and converting it into an electric signal, and a plurality of frequency characteristics of
each of a plurality of other living body sound acquiring devices. And a signal processing unit
configured to generate an output signal by changing the frequency characteristic of the electrical
signal based on the frequency characteristic indicated by one of the frequency characteristic
information items.
[0007]
The operation and other advantages of the present invention will be apparent from the
embodiments to be described below.
[0008]
It is a block diagram showing composition of an electronic stethoscope concerning a 1st
example.
It is a figure which shows an example of the frequency characteristic of a stethoscope.
It is an example of the frequency characteristic information memorized by the frequency
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2
characteristic storage part concerning a 1st example.
It is a block diagram which shows the structure of the electronic stethoscope concerning 2nd
Example.
[0009]
An embodiment according to a living body sound acquiring apparatus of the present invention
will be described.
[0010]
The living body sound acquiring apparatus according to the embodiment includes: a conversion
unit that acquires a living body sound of a subject and converts it into an electrical signal; and
one of a plurality of frequency characteristic information indicating frequency characteristics of
each of a plurality of other living body sound acquiring devices A signal processing unit
configured to generate an output signal by changing a frequency characteristic of the electric
signal based on a frequency characteristic indicated by frequency characteristic information.
[0011]
The conversion unit is, for example, a microphone, a vibration element, or the like, and converts
vibration generated due to body sound into an electrical signal.
For example, a signal processing unit including a memory, a processor, and the like changes the
frequency characteristic of the electrical signal converted by the conversion unit based on the
frequency characteristic indicated by one of the plurality of frequency characteristic information.
, Generate an output signal.
[0012]
The plurality of pieces of frequency characteristic information may be stored in the biological
sound acquisition device, or may be stored in an external storage device such as a server device.
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When a plurality of pieces of frequency characteristic information are stored in an external
storage device, the signal processing unit may be configured to acquire the frequency
characteristic information via a network or the like.
[0013]
The plurality of pieces of frequency characteristic information are information indicating
frequency characteristics of a plurality of other body sound acquiring devices different from the
body sound acquiring device.
In the case of a stethoscope as an example of the biological sound acquisition apparatus, the
“frequency characteristic of the biological sound acquisition apparatus” means the frequency
characteristic of the earpiece (that is, of the sound that the user will hear).
[0014]
Such frequency characteristic information can be constructed by experiment or simulation, for
example, by determining the frequency characteristic of the sound that the user will hear when
white noise (white noise) is input to the biological sound acquisition apparatus. Just do it.
[0015]
When the signal processing unit generates an output signal, the frequency characteristic of the
electric signal is taken into consideration, for example, in consideration of the characteristic of an
earphone or a speaker attached to the biological sound acquisition apparatus in addition to the
frequency characteristic information of one. May be configured to change.
[0016]
According to the living body sound acquiring apparatus according to the present embodiment,
since the frequency characteristic of the electric signal can be changed by the signal processing
unit, the user's discomfort can be reduced.
[0017]
In one aspect of the living body sound acquiring apparatus according to the embodiment, the
living body sound acquiring apparatus further includes a storage control unit that causes an
electric signal to be stored in the storage unit.
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[0018]
According to this aspect, the storage control unit can store the electrical signal relating to the
body sound in the storage unit (that is, record the body sound), which is extremely useful in
practice.
The storage unit may be built in the biological sound acquisition apparatus or may be installed
outside.
[0019]
In another aspect of the living body sound acquiring apparatus according to the embodiment, the
plurality of frequency characteristic information includes one or more frequency characteristic
information indicating frequency characteristics of the analog stethoscope and one or more
indicating frequency characteristics of the electronic stethoscope. And frequency characteristic
information.
[0020]
In this aspect, one or more frequency characteristic information indicating frequency
characteristics of the analog stethoscope and one or more frequency characteristic information
indicating frequency characteristics of the electronic stethoscope may be grouped for each
stethoscope manufacturer.
[0021]
Here, according to the research of the inventor of the present application, the following matters
are known.
That is, the sound that a user such as a doctor listens to via a stethoscope varies depending on
the stethoscope used or the stethoscope manufacturer.
This is because the constituent materials and structures of, for example, a chestpiece, a tube, an
07-05-2019
5
earpiece, and the like that constitute a stethoscope differ from one stethoscope to another or
from one stethoscope manufacturer to another.
Therefore, the user may feel discomfort when using a stethoscope different from usual.
[0022]
As described above, if the plurality of frequency characteristic information includes one or more
frequency characteristic information indicating the frequency characteristic of the analog
stethoscope and one or more frequency characteristic information indicating the frequency
characteristic of the electronic stethoscope. The signal processing unit of the biological sound
acquisition apparatus can reproduce the frequency characteristics of the stethoscope that the
user usually uses.
As a result, the user's discomfort can be reduced.
[0023]
An embodiment according to a living body sound acquiring apparatus of the present invention
will be described based on the drawings.
In the following embodiment, an embodiment according to an electronic stethoscope will be
described as an example of a body sound acquisition apparatus.
[0024]
First Embodiment A first embodiment of the electronic stethoscope will be described with
reference to FIGS. 1 to 3. FIG.
FIG. 1 is a block diagram showing the configuration of the electronic stethoscope according to
the first embodiment.
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6
FIG. 2 is a diagram showing an example of a frequency characteristic of a stethoscope.
FIG. 3 is an example of frequency characteristic information stored in the frequency
characteristic storage unit according to the first embodiment.
[0025]
In FIG. 1, the electronic stethoscope 1 includes a body sound acquisition unit 11, an equalizer
(EQ) assignment unit 12, an output unit 13, a storage control unit 14, a living body information
storage unit 15, a frequency characteristic storage unit 16, and a setting unit 17. Is configured.
[0026]
The body sound acquisition unit 11 includes, for example, a microphone, a vibration element, and
the like, and constitutes a part of a chest piece of the electronic stethoscope 1.
The body sound acquisition unit 11 acquires body sound of the subject and converts the body
sound into an electrical signal. The electrical signal output from the body sound acquisition unit
11 is input to the output unit 13 including, for example, an earphone, a speaker, and the like via
the equalizer application unit 12.
[0027]
In addition, since the existing technology is applicable to the body sound acquisition unit 11 and
the output unit 13, the description of the details thereof is omitted.
[0028]
A plurality of pieces of frequency characteristic information are stored in advance in the
frequency characteristic storage unit 16 (see FIG. 3).
The setting unit 17 applies an equalizer to a signal indicating one of the plurality of pieces of
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7
frequency characteristic information stored in the frequency characteristic storage unit 16 that is
selected by the user via a user interface (not shown). Send to section 12. The frequency
characteristic information stored in the frequency characteristic storage unit 16 may be
appropriately added or updated by, for example, communicating with an external device.
[0029]
The equalizer assignment unit 12 acquires an equalizer setting value corresponding to the one
frequency characteristic information from the frequency characteristic storage unit 16, and from
the living body sound acquisition unit 11 so as to obtain the frequency characteristic indicated
by the one frequency characteristic information. The frequency characteristic of the output
electrical signal is changed to generate an output signal.
[0030]
Here, the frequency characteristics of a stethoscope, whether an electronic stethoscope or an
analog stethoscope, differ depending on the stethoscope or the stethoscope manufacturer (see
FIG. 2).
Therefore, for example, a user who uses a stethoscope having the frequency characteristic shown
in FIG. 2A often feels uncomfortable when using the stethoscope having the frequency
characteristic shown in FIG.
[0031]
In particular, since auscultation is largely attributable to the experience of the user such as a
doctor, auscultation using another stethoscope different from the stethoscope usually used by
the user may affect auscultation knowledge.
[0032]
In the electronic stethoscope 1, the frequency characteristic of the electrical signal output from
the living body sound acquiring unit 11 is changed by the equalizer applying unit 12 based on
the one frequency characteristic information selected by the user. Can be reduced.
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As a result, the influence on the auscultation knowledge resulting from the stethoscope can be
reduced or eliminated.
[0033]
For example, as shown in FIG. 3, the plurality of frequency characteristic information stored in
the frequency characteristic storage unit 16 are grouped by stethoscope manufacturer (here, A
company, B company, C company, ...). Is desirable. When the electronic stethoscope 1 has a
display screen as a user interface, the stethoscope manufacturer and the model name are based
on the plurality of pieces of frequency characteristic information stored in the frequency
characteristic storage unit 16. It may be displayed on the display screen.
[0034]
Returning to FIG. 1 again, the storage control unit 14 stores (that is, records) the electrical signal
output from the biological sound acquisition unit 11 in the biological information storage unit
15, which is, for example, a non-volatile memory. According to this configuration, the electric
signal stored in the living body information storage unit 15 can be reproduced as needed, which
is particularly useful when the user analyzes the body sound of the subject using diagnosis
support software or the like. .
[0035]
In addition, it has become clear from the research of the inventor of the present application that
the electrical signal (so-called raw signal) output from the living body sound acquiring unit 11 is
desirable for the analysis of the living body sound of the subject.
[0036]
The "body sound acquisition unit 11", the "equalizer application unit 12" and the "biological
information storage unit 15" according to the present embodiment are respectively the
"conversion unit", the "signal processing unit" and the "storage device" according to the present
invention. An example of
[0037]
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9
Second Embodiment A second embodiment of the electronic stethoscope will be described with
reference to FIG.
The second embodiment is the same as the first embodiment described above except that the
frequency characteristic storage unit and the biological information storage unit are provided in
an external device different from the electronic stethoscope.
Therefore, in the second embodiment, the description overlapping with the first embodiment is
omitted, and the same reference numerals are given to the common portions in the drawings, and
only the fundamentally different points are described with reference to FIG. explain. FIG. 4 is a
block diagram showing the configuration of the electronic stethoscope according to the second
embodiment, to the same effect as FIG.
[0038]
In FIG. 4, the electronic stethoscope 2 is configured to include a body sound acquisition unit 11,
an equalizer attachment unit 12, an output unit 13, a storage control unit 14, a setting unit 17, a
communication unit 21, and a RAM 22.
[0039]
The setting unit 17 selects one of the plurality of pieces of frequency characteristic information
stored in the frequency characteristic storage unit 31 of the server 30 via the communication
unit 21 and is selected by the user via a user interface (not shown). A signal indicating frequency
characteristic information is transmitted to the equalizer application unit 12.
[0040]
The equalizer assignment unit 12 acquires the equalizer setting value corresponding to the one
frequency characteristic information from the frequency characteristic storage unit 31 via the
communication unit 21 so that the frequency characteristic represented by the one frequency
characteristic information can be obtained. The frequency characteristic of the electrical signal
output from the body sound acquisition unit 11 is changed to generate an output signal.
[0041]
The storage control unit 14 stores the electrical signal output from the biological sound
acquisition unit 11 in the biological information storage unit 41 of the personal computer (PC)
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40 via the communication unit 21.
[0042]
One of the frequency characteristic storage unit and the biological information storage unit may
be incorporated in the electronic stethoscope, and the other of the frequency characteristic
storage unit and the biological information storage unit may be provided in the external device.
[0043]
The present invention is not limited to the embodiment described above, and can be
appropriately modified without departing from the scope or spirit of the invention as can be read
from the claims and the specification as a whole, and body sound acquisition accompanied by
such modifications Devices are also within the scope of the present invention.
[0044]
1, 2 ... electronic stethoscope, 11 ... body sound acquisition unit, 12 ... equalizer attachment unit,
13 ... output unit, 14 ... storage control unit, 15, 41 ... biological information storage unit, 16, 31
... frequency characteristic storage unit, 17: setting unit, 21: communication unit, 22: RAM, 30:
server, 40: personal computer
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