CN114515164A - Acoustic signal acquisition method, acoustic signal acquisition device, stethoscope, and storage medium - Google Patents
Acoustic signal acquisition method, acoustic signal acquisition device, stethoscope, and storage medium Download PDFInfo
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- CN114515164A CN114515164A CN202210119158.5A CN202210119158A CN114515164A CN 114515164 A CN114515164 A CN 114515164A CN 202210119158 A CN202210119158 A CN 202210119158A CN 114515164 A CN114515164 A CN 114515164A
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- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B7/00—Instruments for auscultation
- A61B7/02—Stethoscopes
- A61B7/026—Stethoscopes comprising more than one sound collector
Abstract
The application discloses an acoustic signal acquisition method, an acoustic signal acquisition device, a stethoscope and a storage medium, and relates to the technical field of medical treatment. The method is applied to a stethoscope which comprises a auscultation diaphragm and a first audio acquisition device, wherein the first audio acquisition device comprises a plurality of microphones. The method comprises the following steps: when the auscultation diaphragm vibrates to drive the air vibration, auscultation sound signals generated by the air vibration are picked up through the first audio acquisition device, auscultation sound signals picked up by the plurality of microphones respectively are acquired, and target auscultation sound signals are acquired based on the auscultation sound signals picked up by the plurality of microphones respectively. This application passes through the multichannel and gathers auscultation sound signal, can realize the effect of auscultation sound signal reinforcing, realizes the promotion of SNR to promote the auscultation effect.
Description
Technical Field
The present application relates to the field of medical technology, and more particularly, to an acoustic signal acquisition method, apparatus, electronic device, and storage medium.
Background
Auscultation diagnosis is a method for judging diseases according to characteristics expressed by sound signals through physiological sound signals emitted by a human body, is commonly used for cardiovascular diseases, respiratory diseases and the like, and is mainly used for diagnosing picked physiological sound signals by picking up heart sounds, lung sounds and the like according to experience of doctors aiming at organs such as heart, lung and the like. The stethoscope is matched with an important tool for auscultation diagnosis, but the auscultation effect of the current stethoscope is poor.
Disclosure of Invention
In view of the above problems, the present application proposes an acoustic signal acquisition method, apparatus, electronic device, and storage medium to solve the above problems.
In a first aspect, an embodiment of the present application provides a method for acquiring an acoustic signal, which is applied to a stethoscope, where the stethoscope includes a stethoscope diaphragm and a first audio acquisition device, where the first audio acquisition device includes a plurality of microphones, and the method includes: when the auscultation diaphragm vibrates to drive air to vibrate, auscultation sound signals generated by the air vibration are picked up through the first audio acquisition device; acquiring auscultation sound signals picked up by the plurality of microphones respectively; obtaining a target auscultation sound signal based on the auscultation sound signals picked up by the plurality of microphones respectively.
In a second aspect, an embodiment of the present application provides an acoustic signal acquiring apparatus applied to a stethoscope, where the stethoscope includes a stethoscope diaphragm and a first audio collecting device, the first audio collecting device includes a plurality of microphones, and the apparatus includes: the pickup control module is used for picking up auscultation sound signals generated by air vibration through the first audio acquisition device when the auscultation diaphragm vibrates to drive the air to vibrate; an auscultation sound signal acquisition module for acquiring auscultation sound signals picked up by the plurality of microphones respectively; a target auscultation sound signal obtaining module, configured to obtain a target auscultation sound signal based on the auscultation sound signals picked up by the microphones respectively.
In a third aspect, embodiments of the present application provide a stethoscope comprising a memory and a processor, the memory being coupled to the processor, the memory storing instructions that, when executed by the processor, the processor performs the above method.
In a fourth aspect, the present application provides a computer-readable storage medium, in which a program code is stored, and the program code can be called by a processor to execute the above method.
The embodiment of the application provides a sound signal obtains method, a device, stethoscope and storage medium, when auscultation vibrating diaphragm vibration drives the air vibration, the auscultation sound signal that produces the air vibration is picked up through first audio acquisition device, obtain the auscultation sound signal that a plurality of microphones picked up respectively, based on the auscultation sound signal that a plurality of microphones picked up respectively, obtain target auscultation sound signal, thereby gather auscultation sound signal through the multichannel, can realize the effect of auscultation sound signal reinforcing, realize the promotion of SNR, thereby promote the auscultation effect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a stethoscope provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram illustrating a first viewing angle of an auscultation diaphragm provided in an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating a second viewing angle of an auscultation diaphragm according to an embodiment of the present application;
fig. 4 is a schematic flow chart illustrating an acoustic signal acquisition method according to an embodiment of the present application;
fig. 5 is a schematic flow chart illustrating an acoustic signal acquisition method according to an embodiment of the present application;
fig. 6 shows a flow chart of step S240 of the acoustic signal acquisition method shown in fig. 5 of the present application;
fig. 7 shows a flow chart of step S241 of the acoustic signal acquisition method shown in fig. 6 of the present application;
fig. 8 is a flowchart illustrating step S2411 of the acoustic signal acquisition method illustrated in fig. 7 of the present application;
FIG. 9 illustrates a schematic waveform diagram of an auscultated sound signal provided by an embodiment of the present application;
fig. 10 shows a block diagram of an acoustic signal acquisition apparatus provided in an embodiment of the present application;
fig. 11 shows a block diagram of an electronic device for executing an acoustic signal acquisition method according to an embodiment of the present application;
fig. 12 illustrates a storage unit of an embodiment of the present application for storing or carrying program codes for implementing an acoustic signal acquisition method according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
The front end of the traditional stethoscope is a membrane cavity with a large area, and one end plugged into ears has a larger gas vibration amplitude than a cavity channel due to the fact that the cavity channel is thin and narrow, so that sound wave vibration in a body can be amplified, and the stethoscope is manufactured by applying the principle. The traditional stethoscope consists of a diaphragm and a hollow gas-filled tube, and has the defects of low sensitivity, high background noise, frequency band distortion, incapability of quantitative measurement and the like. The electronic stethoscope can overcome the defects to a certain extent, and the signal to noise ratio of signals is improved to a certain extent. The electronic stethoscope is generally composed of a diaphragm, a sound cavity, a sound pickup part, a microphone and the like.
Although the design of the electronic stethoscope is advanced, the novel stethoscope applies basic signal processing technologies such as digital filtering and amplification; however, all commercially available electronic stethoscopes are still single-channel devices, the single-channel electronic stethoscopes cannot benefit from more effective multi-channel signal processing methods, such as multi-channel noise elimination, beam forming and the like, and the overall signal-to-noise ratio of the electronic stethoscopes on the market is to be improved; meanwhile, most of the existing electronic stethoscopes cannot well eliminate the influence of environmental noise, so that the auscultation effect is greatly influenced.
The current main defect is low signal-to-noise ratio, so that a good signal input cannot be provided when an auscultation diagnosis algorithm is carried out or a doctor auscultates, and the diagnosis effect is influenced; meanwhile, the prior art scheme is greatly interfered by environmental noise, and cannot effectively pick up auscultated sound signals under complex environments such as strong background noise, so that auscultation diagnosis is seriously affected, and the auscultation effect is poor.
In view of the above problems, the inventor finds, through long-term research, that the method, the device, the stethoscope, and the storage medium for acquiring acoustic signals provided in the embodiment of the present application are provided, and auscultation acoustic signals are acquired through multiple channels, so that an effect of auscultation acoustic signal enhancement can be achieved, and a signal-to-noise ratio can be improved, thereby improving an auscultation effect. The specific acoustic signal acquisition method is described in detail in the following embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a stethoscope according to an embodiment of the present disclosure. As shown in fig. 1, the stethoscope 100 includes a stethoscope diaphragm 101, a structural member 102, a structural device 103, a sound cavity 104, a sound receiving port 105, a first audio acquisition device 106, a second audio acquisition device 107 and a sealing ring 108. Wherein, the auscultation diaphragm 101 is used for contacting with the skin, the heart sound, the lung sound and the like cause the auscultation diaphragm 101 to vibrate by means of vibration conduction, and the sound cavity 104 is used for realizing the sound gathering effect.
In some embodiments, for the auscultation diaphragm 101, a structural device 103 is generally required to fix the auscultation diaphragm 101, so that the structural device 103 has a certain height difference (generally within 3 mm), and due to the height difference, the attachment degree of the auscultation diaphragm 101 to the skin and thus the signal-to-noise ratio of auscultation can be affected when auscultation measurement is performed. As shown in fig. 2, the material of the auscultation diaphragm 101 may be selected from a glass fiber press plate, plastic, etc. with certain rigidity; in order to reduce the height difference, a structural member (boss) 102 may be provided, and due to the existence of the structural member 102, the auscultation diaphragm 101 may be lifted, so that the auscultation diaphragm 101 may be in good contact with the skin, and the attenuation of the acoustic signal during the interface coupling between the skin and the auscultation diaphragm 101 during the conduction process may be reduced; because auscultation diaphragm 101 has certain rigidity, needs certain compliance's material to realize with structure 102 junction, and silica gel material can be chooseed for use to this embodiment, consequently can through the material joint of bijection injection molding process with two kinds of materials, can be with the auscultation diaphragm 101 and the silica gel injection moulding of plastics material, as shown in fig. 3, wherein the inner circle is auscultation diaphragm 101, and outer lane radio mouthful 105 is silica gel.
In some embodiments, the main function of the acoustic cavity 104 is sound gathering, designed from the cavity shape, height, and exit area, respectively; the shape of the cavity can be an inward concave cavity, so that a good sound gathering effect with a large contact surface with skin and a small sound outlet area can be realized; in addition, the height of the cavity is also a factor influencing the sound gathering rate and the frequency response, and the optional height of the cavity is comprehensively considered to be 5-10mm in the embodiment; the outlet area of the cavity is combined with the sound receiving port of the microphone and the frequency response, and the optional outlet of the embodiment is a circular outlet with the diameter of 1-2mm under the comprehensive consideration. Through the design, the stacking of the performance and the product structure can be well considered.
Referring to fig. 4, fig. 4 is a schematic flowchart illustrating an acoustic signal acquiring method according to an embodiment of the present application. The method is used for collecting auscultation sound signals through multiple channels, the effect of auscultation sound signal enhancement can be achieved, the signal to noise ratio is improved, and therefore the auscultation effect is improved. In a specific embodiment, the acoustic signal acquisition method is applied to the acoustic signal acquisition apparatus 200 shown in fig. 10 and the stethoscope 100 (fig. 11) equipped with the acoustic signal acquisition apparatus 200. In this implementation, the stethoscope includes an auscultation diaphragm and a first audio collection device, and the first audio stimulation device includes a plurality of microphones. As will be described in detail with respect to the flow shown in fig. 4, the acoustic signal acquiring method may specifically include the following steps:
step S110: when the auscultation diaphragm vibrates to drive air vibration, auscultation sound signals generated by the air vibration are picked up through the first audio acquisition device.
In this embodiment, when the auscultation diagnosis of the target object by the stethoscope is required, the auscultation diaphragm of the stethoscope may be attached to the skin surface of the target object to cause the auscultation diaphragm to vibrate by means of vibration conduction of heart sounds, lung sounds and the like. In some embodiments, the structural member for jacking the auscultation diaphragm is arranged below the auscultation diaphragm, so that the auscultation diaphragm can be better contacted with the skin surface of the target object when being attached to the skin surface of the target object, and the attenuation of auscultation sound signals when the skin is coupled with the auscultation diaphragm surface in the conduction process can be reduced. In some embodiments, since the sound cavity 104 of the stethoscope is a concave cavity, a good sound gathering effect with a small initial sound mouth area can be achieved due to the contact area with the skin.
By way of example, the target object may include a human, an animal, etc., and the skin surface of the target object may include a human heart skin surface, a human lung skin surface, an animal heart skin surface, an animal lung skin surface, etc., without limitation.
In some embodiments, the stethoscope is being used to perform a stethoscope, and the auscultation diaphragm of the stethoscope may be attached to the skin surface of the target object, and at this time, the vibration of the auscultation diaphragm may be induced based on the vibration conduction of the heart sound and lung sound of the target object, so that the air in the stethoscope is driven to vibrate by the vibration of the auscultation diaphragm. In this embodiment, when the auscultation diaphragm drives the air to vibrate, the auscultation sound signal generated by the air vibration can be picked up by the first audio collecting device of the stethoscope.
In some embodiments, the first audio capture device may include a plurality of microphones, for example, the first audio capture device may include 2 microphones, may include 3 microphones … …, may include n microphones, and so on, where n is an integer greater than 3. In one embodiment, the plurality of microphones may be arranged regularly or irregularly, and the like, and is not limited herein. When the plurality of microphones are regularly arranged, the plurality of microphones may be sequentially arranged at intervals along the target direction of the stethoscope, for example, sequentially arranged at intervals along the longitudinal direction of the stethoscope, sequentially arranged at intervals along the transverse direction of the stethoscope, arranged in a circular ring along the circumference of the stethoscope, and the like, which are not limited herein.
When the first audio acquisition device comprises 2 microphones, when the auscultation diaphragm vibrates to drive air to vibrate, auscultation sound signals generated by air vibration can be picked up through the 2 microphones; when first audio acquisition device includes 3 microphones, then when auscultation vibrating diaphragm vibration drives the air vibration, then can pick up the auscultation sound signal that the air vibration produced through 3 microphones.
Wherein, when this first audio frequency collection system includes 2 microphones, then this first audio frequency collection system can be the binary channels microphone, and this binary channels microphone can be used for carrying out auscultation sound signal's the picking up, owing to used the design of binary channels microphone, realization auscultation sound signal's that can be fine reinforcing reaches the effect that improves the SNR when picking up auscultation sound signal.
Step S120: auscultation sound signals picked up by the plurality of microphones respectively are acquired.
In this embodiment, when the auscultation sound signals generated by the air vibration are picked up by the first audio collecting device, the auscultation sound signals collected by the first audio collecting device can be obtained, that is, the auscultation sound signals picked up by each of the plurality of microphones can be obtained.
In some embodiments, the auscultation sound signals picked up by the plurality of microphones may be obtained in real time, the auscultation sound signals picked up by the plurality of microphones may be obtained at preset time intervals, the auscultation sound signals picked up by the plurality of microphones may be obtained for a preset time period, and the like, which is not limited herein.
Step S130: obtaining a target auscultated sound signal based on the auscultated sound signals picked up by the plurality of microphones respectively.
In this embodiment, after obtaining the auscultation sound signals picked up by the plurality of microphones, the target auscultation sound signals can be obtained based on the auscultation sound signals picked up by the plurality of microphones, wherein the target auscultation sound signals are the sound signals conducted into the ears of the user.
In some embodiments, after the auscultation sound signals respectively picked up by the multiple microphones are obtained, the auscultation sound signals respectively picked up by the multiple microphones can be synthesized to obtain the target auscultation sound signals, so that an auscultation sound signal enhancement effect can be realized, a signal-to-noise ratio can be improved, and a good data guarantee is provided for subsequent auscultation diagnosis. As a practical way, the synthesizing process of the auscultated sound signals picked up by the plurality of microphones may include: the auscultation sound signals picked up by the plurality of microphones are subjected to superposition processing, the auscultation sound signals picked up by the plurality of microphones are subjected to weighted superposition processing, and the like, which is not limited herein.
In some embodiments, after obtaining the auscultation sound signals picked up by the plurality of microphones respectively, synthesizing the auscultation sound signals picked up by the plurality of microphones respectively to obtain a synthesized sound signal, and then determining whether the synthesized sound signal satisfies a preset sound signal condition, wherein when the determination result indicates that the synthesized sound signal satisfies the preset sound signal condition, the synthesized sound signal may be determined as the target auscultation sound signal, and when the determination result indicates that the synthesized sound signal does not satisfy the preset sound signal condition, the first audio collecting device may be controlled to re-collect the audio sound signal until the synthesized sound signal obtained based on the re-collected audio sound signal satisfies the preset sound signal condition.
As a practical way, the preset acoustic signal condition may include: the definition of the synthesized sound signal satisfies the preset definition, the noise amount of the synthesized sound signal is smaller than the preset noise amount, and the like, which are not limited herein.
The sound signal acquisition method provided by the embodiment of the application, when auscultation vibrating diaphragm vibration drives air vibration, auscultation sound signal that produces air vibration is picked up through first audio acquisition device, acquire auscultation sound signal that a plurality of microphones picked up respectively, based on auscultation sound signal that a plurality of microphones picked up respectively, obtain target auscultation sound signal, thereby gather auscultation sound signal through the multichannel, can realize the effect of auscultation sound signal reinforcing, realize the promotion of SNR, thereby promote auscultation effect
Referring to fig. 5, fig. 5 is a schematic flowchart illustrating an acoustic signal acquiring method according to an embodiment of the present application. The method is applied to the stethoscope, the stethoscope comprises a stethoscope diaphragm, a first audio acquisition device and a second audio acquisition device, and the first audio acquisition device comprises a plurality of microphones. As will be described in detail with respect to the flow shown in fig. 5, the acoustic signal acquiring method may specifically include the following steps:
step S210: when the auscultation diaphragm vibrates to drive air vibration, auscultation sound signals generated by the air vibration are picked up through the first audio acquisition device.
Step S220: auscultation sound signals picked up by the plurality of microphones respectively are acquired.
For the detailed description of steps S210 to S220, refer to steps S110 to S120, which are not described herein again.
Step S230: and acquiring the environmental noise signal acquired by the second audio acquisition device.
In some embodiments, the stethoscope can further include a second audio capture device that can be used to capture ambient noise for overall noise reduction of the audio acoustic signal. The second audio acquisition device can be one or more microphones, and when the second audio acquisition device only comprises one microphone, the second audio acquisition device can acquire an environmental noise signal through the microphone and acquire the environmental noise signal acquired by the microphone; when the second audio acquisition device comprises a plurality of microphones, the plurality of microphones can be used for acquiring the environmental noise signals, and the environmental noise signals acquired by the plurality of microphones respectively are acquired.
In some embodiments, the stethoscope may be configured with the first audio acquisition device and the second audio acquisition device simultaneously, so that the first audio acquisition device (multiple microphones) and the second audio acquisition device may be used to acquire audio signals simultaneously, and auscultation sound signals acquired by the multiple microphones respectively and environmental noise signals acquired by the second audio acquisition device are obtained. The auscultation sound signals collected by the microphones are used for enhancing the signal-to-noise ratio, and the environmental noise signals collected by the second audio collecting device are used for eliminating or weakening the influence of the environmental noise.
In some embodiments, based on the characteristic that the frequencies of the environmental noise signal and the auscultation sound signal are different, the present embodiment may preset and store a frequency corresponding to the auscultation sound signal, that is, a preset frequency, where the preset frequency is used as a basis for determining the collected multiple audio signals. Therefore, in this embodiment, the audio signal may be acquired by the second audio acquisition device, and after acquiring the plurality of audio signals, the frequency of each of the plurality of audio signals may be compared with the preset frequency to determine whether the frequency of each of the audio signals matches the preset frequency, and according to the determination result, the audio signal not belonging to the preset frequency may be acquired from the plurality of audio signals as the environmental noise signal.
Step S240: obtaining the target auscultation sound signal based on the auscultation sound signals picked up by the plurality of microphones respectively and the environmental noise signal.
In this embodiment, after obtaining the auscultation sound signals picked up by the plurality of microphones (the auscultation sound signals picked up by the first audio collecting device) and the environmental noise signals picked up by the second audio collecting device, the target auscultation signals can be obtained based on the auscultation sound signals picked up by the plurality of microphones and the environmental noise signals picked up by the second audio collecting device, where the target auscultation signals are the sound signals conducted into the ears of the user.
In some embodiments, after obtaining the auscultation sound signals picked up by the plurality of microphones and the environmental noise signals picked up by the second audio collecting device, the auscultation sound signals picked up by the plurality of microphones may be synthesized to obtain synthesized sound signals, and the synthesized sound signals and the environmental noise signals are filtered to obtain target noise signals, so that the target auscultation sound signals are obtained, the auscultation sound signals can be enhanced, the influence of the environmental noise signals can be suppressed, and the signal-to-noise ratio can be improved.
Referring to fig. 6, fig. 6 is a flowchart illustrating step S240 of the acoustic signal acquiring method illustrated in fig. 5 according to the present application. As will be explained in detail with respect to the flow shown in fig. 6, the method may specifically include the following steps:
step S241: and synthesizing the auscultation sound signals picked up by the plurality of microphones respectively to obtain synthesized sound signals.
In this embodiment, after obtaining the auscultation sound signals picked up by the plurality of microphones respectively, the auscultation sound signals picked up by the plurality of microphones respectively may be subjected to synthesis processing to obtain the synthesized sound signals. As a practical way, after the auscultation sound signals picked up by the plurality of microphones are obtained, the auscultation sound signals picked up by the plurality of microphones can be synthesized into one auscultation sound signal in a beam forming way, that is, the synthesized sound signal.
Referring to fig. 7, fig. 7 is a flowchart illustrating step S241 of the acoustic signal acquiring method illustrated in fig. 6 according to the present application. As will be explained in detail with respect to the flow shown in fig. 7, the method may specifically include the following steps:
step S2411: and acquiring weights corresponding to the auscultation sound signals picked up by the plurality of microphones respectively, wherein the sum of the weights corresponding to the auscultation sound signals picked up by the plurality of microphones respectively is 1.
In this embodiment, after obtaining the auscultation sound signals picked up by each of the plurality of microphones, weights corresponding to the auscultation sound signals picked up by each of the plurality of microphones may be obtained, where a sum of the weights corresponding to the auscultation sound signals picked up by each of the plurality of microphones is 1.
In some embodiments, the weight corresponding to the auscultatory sound signals may correspond to the auscultatory sound signals, i.e., the size of the weight corresponding to the auscultatory sound signals may vary from one auscultatory sound signal to another, regardless of other factors. At this time, the auscultated sound signals picked up by the plurality of microphones respectively can be obtained, the auscultated sound signals picked up by the plurality of microphones respectively are analyzed, the analysis result is obtained, and the weight corresponding to the auscultated sound signals picked up by the plurality of microphones respectively is determined based on the analysis result.
In some embodiments, the weight corresponding to the auscultatory sound signal corresponds to the microphone, i.e., the size of the weight corresponding to the auscultatory sound signal may vary from microphone to microphone, regardless of other factors. At this time, the microphone corresponding to each auscultation sound signal is acquired, and the weight corresponding to each microphone is acquired, and based on the microphone corresponding to each auscultation sound signal and the weight corresponding to each microphone, the weight corresponding to the auscultation sound signal picked up by each of the plurality of microphones can be determined.
Referring to fig. 8, fig. 8 is a flowchart illustrating the step S2411 of the acoustic signal acquiring method illustrated in fig. 7 according to the present application. As will be explained in detail with respect to the flow shown in fig. 8, the method may specifically include the following steps:
step S24111: and acquiring the variance of the signal-to-noise ratio corresponding to the auscultation sound signals picked up by the plurality of microphones in the target time period.
In this embodiment, the stethoscope may be preset and stored with a target time period, which is used as a time duration basis for acquiring a variance of a signal-to-noise ratio corresponding to the auscultated sound signal. Therefore, in the present embodiment, the auscultation sound signals picked up by the plurality of microphones in the target time period respectively can be acquired, and the variance of the signal-to-noise ratios corresponding to the auscultation sound signals picked up by the plurality of microphones in the target time period respectively can be calculated based on the auscultation sound signals picked up by the plurality of microphones in the target time period respectively.
As a practical way, taking one microphone (hereinafter referred to as a target microphone) of the microphones as an example, the auscultation sound signal picked up by the target microphone in the target time period can be obtained, and based on the auscultation sound signal picked up by the target microphone in the target time period, the variance of the signal-to-noise ratio corresponding to the auscultation sound signal picked up by the target microphone in the target time period can be calculated and obtained. For example, referring to fig. 9, the SNR of the auscultated sound signal picked up by the target microphone may be calculated by SNR 20 × log (a1/a2), and then the variance of the SNR corresponding to the auscultated sound signal picked up by the target microphone in the target time period may be calculated by a plurality of SNRs in the target time period, where a1 and a2 are signal amplitudes for reflecting the auscultated sound signal.
Step S24112: and acquiring weights corresponding to the auscultation sound signals picked up by the plurality of microphones respectively based on the variance of the signal-to-noise ratios corresponding to the auscultation sound signals picked up by the plurality of microphones respectively in the target time period.
In this embodiment, after obtaining the variance of the signal-to-noise ratio corresponding to each of the auscultation sound signals picked up by each of the plurality of microphones in the target time period, the weight corresponding to each of the auscultation sound signals picked up by each of the plurality of microphones may be obtained based on the variance of the signal-to-noise ratio corresponding to each of the auscultation sound signals picked up by each of the plurality of microphones in the target time period.
As an implementable manner, can be based on
Acquiring the weight corresponding to the auscultation sound signals picked up by the microphones respectively, wherein, omegaiThe weight corresponding to the ith auscultated sound signal,
is the variance of the signal-to-noise ratio corresponding to the ith auscultated sound signal, wherein 1 is an integer greater than or equal to 1, and n is an integer greater than or equal to 2. For example, when n is 2, then
Acquiring weights corresponding to auscultation sound signals picked up by the 2 microphones respectively, wherein omegaiThe weight corresponding to the ith auscultated sound signal,
is the variance of the signal-to-noise ratio corresponding to the 1 st auscultated sound signal,
is the variance of the signal-to-noise ratio corresponding to the 2 nd auscultated sound signal.
Step S2412: and obtaining weighted sound signals corresponding to the auscultated sound signals picked up by the plurality of microphones respectively based on the auscultated sound signals picked up by the plurality of microphones respectively and the weights corresponding to the auscultated sound signals picked up by the plurality of microphones respectively.
In this embodiment, after obtaining the auscultation sound signals picked up by the plurality of microphones respectively and the weights corresponding to the auscultation sound signals picked up by the plurality of microphones respectively, the weighted sound signals corresponding to the auscultation sound signals picked up by the plurality of microphones respectively can be obtained based on the auscultation sound signals picked up by the plurality of microphones respectively and the weights corresponding to the auscultation sound signals picked up by the plurality of microphones respectively.
In some embodiments, after obtaining the auscultated sound signals picked up by each of the plurality of microphones and the weights corresponding to the auscultated sound signals picked up by each of the plurality of microphones, the product of each auscultated sound signal and the corresponding weight may be calculated as the weighted sound signal corresponding to each auscultated sound signal. For example, if the auscultation sound signal is S and the weight is ω, the weighted sound signal corresponding to the auscultation sound signal S is ω × S.
Step S2413: and synthesizing weighted sound signals corresponding to the auscultation sound signals picked up by the plurality of microphones respectively to obtain the synthesized sound signals.
In some embodiments, after obtaining the weighted sound signals corresponding to the auscultation sound signals picked up by the plurality of microphones, the weighted sound signals corresponding to the auscultation sound signals picked up by the plurality of microphones may be synthesized to obtain synthesized sound signals.
As a practical way, after obtaining the weighted sound signals corresponding to the auscultation sound signals picked up by the plurality of microphones respectively, the weighted sound signals corresponding to the auscultation sound signals picked up by the plurality of microphones respectively may be added to obtain the synthesized sound signal.
In some embodiments, can be by SCombination of Chinese herbs＝ω1×S1...+ωn×SnSynthesizing weighted sound signals corresponding to the auscultation sound signals picked up by the plurality of microphones respectively to obtain synthesized sound signals, wherein SCombination of Chinese herbsFor synthesizing acoustic signals, omegan×SnFor weighting acoustic signals, SnFor auscultating acoustic signals, omeganN is an integer greater than or equal to 2, which is the weight corresponding to the auscultated sound signal. For example, when n is 2, then S can be passedCombination of Chinese herbs＝ω1×S1+ω2×S2Synthesizing a first weighted sound signal corresponding to the first auscultated sound signal picked up by the first microphone and a second weighted sound signal corresponding to the second auscultated sound signal picked up by the second microphone to obtain a synthesized sound signal, wherein ω is1×S1For the first weighted acoustic signal, ω2×S2For the second weighted acoustic signal, S1For the first acoustic signal, S2Is the second auscultatory acoustic signal, omega1The weight, ω, corresponding to the first auscultated sound signal2The weight corresponding to the second auscultated sound signal.
Step S242: and filtering the synthesized sound signal based on the environment noise signal to obtain the target auscultation sound signal.
In this embodiment, after the synthesized sound signal is synthesized based on the auscultation sound signals respectively collected by the plurality of microphones, the synthesized sound signal may be filtered based on the environmental noise signal to obtain the target auscultation sound signal. As a practical manner, after the synthesized sound signal is synthesized based on the auscultation sound signals respectively collected by the plurality of microphones, the noise signal included in the synthesized sound signal may be eliminated based on the environmental noise signal, so as to obtain the target auscultation sound signal.
In some embodiments, can be by SEyes of a user＝SCombination of Chinese herbs-α×SNoise reductionFiltering the synthesized sound signal based on the ambient noise signal to obtain a target auscultation sound signal, wherein SEyes of a userAuscultating the acoustic signal for the target, SNoise reductionIs an environment noise signal, alpha is a filter factor of the environment noise signal, and alpha is more than 0 and less than or equal to 1. As a practical way, when synthesizing the acoustic signal SCombination of Chinese herbs＝ω1×S1...+ωn×SnThen the target auscultates the sound signal SEyes of a user＝ω1×S1...+ωn×Sn-α×SNoise reduction. For example, when n is 2, then S can be passedEyes of a user＝ω1×S1+ω2×S2-α×SNoise reductionSynthesizing and filtering a first weighted sound signal corresponding to a first auscultation sound signal picked up by a first microphone, a second weighted sound signal corresponding to a second auscultation sound signal picked up by a second microphone and an environmental noise signal collected by a second audio collection device to obtain a target auscultation sound signal, wherein omega is1×S1For the first weighted acoustic signal, ω2×S2For the second weighted acoustic signal, S1For the first acoustic signal, S2Is the second auscultatory acoustic signal, omega1The weight, ω, corresponding to the first auscultated sound signal2Is the weight corresponding to the second auscultated sound signal, SNoise reductionIs the ambient noise signal, and α is the filter factor of the ambient noise signal.
According to the sound signal acquisition method provided by the embodiment of the application, when the auscultation diaphragm vibrates to drive air vibration, the auscultation sound signals generated by the air vibration are picked up through the first audio acquisition device, the auscultation sound signals picked up by the plurality of microphones respectively are acquired, the environmental noise signals collected by the second audio acquisition device are acquired, and the target auscultation sound signals are acquired based on the auscultation sound signals and the environmental noise signals picked up by the plurality of microphones respectively. Compared with the acoustic signal acquiring method shown in fig. 4, the embodiment further acquires the ambient noise signal through the second audio acquiring device to suppress the influence of the ambient noise, thereby improving the auscultation effect.
Referring to fig. 10, fig. 10 is a block diagram illustrating an acoustic signal acquiring apparatus according to an embodiment of the present application. The acoustic signal acquisition apparatus 200 is applied to the stethoscope, the stethoscope includes an auscultation diaphragm and a first audio acquisition device, the first audio acquisition device includes a plurality of microphones, and the block diagram described with reference to fig. 10 is described below, and the acoustic signal acquisition apparatus 200 includes: a pick-up control module 210, an auscultation sound signal acquisition module 220, and a target auscultation sound signal acquisition module 230, wherein:
and the pick-up control module 210 is configured to pick up an auscultation sound signal generated by the air vibration through the first audio acquisition device when the auscultation diaphragm vibrates to drive the air vibration.
An auscultation sound signal acquiring module 220, configured to acquire auscultation sound signals picked up by the plurality of microphones respectively.
A target auscultation sound signal obtaining module 230, configured to obtain a target auscultation sound signal based on the auscultation sound signals picked up by the microphones respectively.
Further, the stethoscope further includes a second audio collecting device, and the target auscultation sound signal obtaining module 230 includes: an ambient noise signal acquisition submodule and a target auscultation sound signal acquisition submodule, wherein:
and the environmental noise signal acquisition submodule is used for acquiring the environmental noise signal acquired by the second audio acquisition device.
A target auscultation sound signal obtaining sub-module for obtaining the target auscultation sound signal based on the auscultation sound signals picked up by the plurality of microphones respectively and the ambient noise signal.
Further, the target auscultation sound signal obtaining sub-module includes: a synthesized sound signal obtaining unit and a target auscultated sound signal obtaining unit, wherein:
and a synthesized sound signal obtaining unit configured to perform synthesis processing on the auscultation sound signals picked up by the plurality of microphones, respectively, to obtain a synthesized sound signal.
Further, the synthetic sound signal obtaining unit includes: a weight obtaining subunit, a weighted acoustic signal obtaining subunit, and a synthesized acoustic signal obtaining subunit, wherein:
the weight acquiring subunit is configured to acquire weights corresponding to the auscultation sound signals picked up by the microphones, where a sum of the weights corresponding to the auscultation sound signals picked up by the microphones is 1.
Further, the weight obtaining subunit includes: a variance obtaining subunit and a weight obtaining subunit, wherein:
and the variance acquiring subunit is used for acquiring the variance of the signal-to-noise ratio corresponding to the auscultation sound signals picked up by the microphones in the target time period.
The weight acquisition subunit is configured to acquire weights corresponding to the auscultated sound signals picked up by the plurality of microphones respectively based on variances of signal-to-noise ratios corresponding to the auscultated sound signals picked up by the plurality of microphones respectively in the target time period.
Further, the weight obtaining subunit includes: a weight acquisition subunit, wherein:
a weight acquisition subunit for obtaining a weight based on
Obtaining weights corresponding to auscultation sound signals picked up by the plurality of microphones respectively, wherein omegaiThe weight corresponding to the ith auscultated sound signal,
is the variance of the signal-to-noise ratio corresponding to the ith auscultation sound signal, wherein 1 is an integer greater than or equal to 1, and n is an integer greater than or equal to 2.
And the weighted sound signal obtaining subunit is configured to obtain weighted sound signals corresponding to the auscultation sound signals picked up by the plurality of microphones, based on the auscultation sound signals picked up by the plurality of microphones and weights corresponding to the auscultation sound signals picked up by the plurality of microphones.
And the synthesized sound signal obtaining subunit is configured to perform synthesis processing on the weighted sound signals corresponding to the auscultation sound signals picked up by the plurality of microphones respectively to obtain the synthesized sound signals.
Further, the synthesized sound signal obtaining subunit includes: a synthesized acoustic signal obtaining subunit, wherein:
a synthesized sound signal obtaining subunit for passing SCombination of Chinese herbs＝ω1×S1...+ωn×SnSynthesizing weighted sound signals corresponding to the auscultation sound signals picked up by the plurality of microphones respectively to obtain the synthesized sound signals, wherein SCombination of Chinese herbsFor synthesizing acoustic signals, omegan×SnFor weighting acoustic signals, SnFor auscultating acoustic signals, omeganN is an integer greater than or equal to 2, which is the weight corresponding to the auscultated sound signal.
A target auscultation sound signal obtaining unit, configured to perform filtering processing on the synthesized sound signal based on the environmental noise signal, so as to obtain the target auscultation sound signal.
Further, the target auscultation sound signal obtaining unit includes: a target auscultation sound signal obtaining subunit, wherein:
a target auscultation sound signal obtaining subunit for passing SEyes of a user＝SCombination of Chinese herbs-α×SNoise reductionFiltering the synthesized sound signal based on the environmental noise signal to obtain the target auscultation sound signal, wherein SEyes of a userAuscultating the acoustic signal for the target, SNoise reductionIs an environment noise signal, alpha is a filter factor of the environment noise signal, and alpha is more than 0 and less than or equal to 1.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and modules may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, the coupling between the modules may be electrical, mechanical or other type of coupling.
In addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
Referring to fig. 11, a block diagram of a stethoscope 100 according to an embodiment of the present disclosure is shown. The stethoscope 100 may be an electronic device capable of running an application, such as a smart phone, a tablet computer, an electronic book, or the like. The stethoscope 100 in the present application may include one or more of the following components: a processor 110, a memory 120, and one or more applications, wherein the one or more applications may be stored in the memory 120 and configured to be executed by the one or more processors 110, the one or more programs configured to perform a method as described in the aforementioned method embodiments.
The Memory 120 may include a Random Access Memory (RAM) or a Read-Only Memory (Read-Only Memory). The memory 120 may be used to store instructions, programs, code sets, or instruction sets. The memory 120 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing various method embodiments described below, and the like. The data storage area may also store data created by the stethoscope 100 during use (such as phone books, audio-video data, chat log data), and the like.
Referring to fig. 12, a block diagram of a computer-readable storage medium according to an embodiment of the present application is shown. The computer-readable medium 300 has stored therein a program code that can be called by a processor to execute the method described in the above-described method embodiments.
The computer-readable storage medium 300 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. Alternatively, the computer-readable storage medium 300 includes a non-volatile computer-readable storage medium. The computer readable storage medium 300 has storage space for program code 310 for performing any of the method steps of the method described above. The program code can be read from or written to one or more computer program products. The program code 310 may be compressed, for example, in a suitable form.
To sum up, the sound signal acquisition method, device, stethoscope and storage medium that this application embodiment provided, when auscultation vibrating diaphragm vibration drives the air vibration, the auscultation sound signal that produces the air vibration through first audio acquisition device is picked up, acquire the auscultation sound signal that a plurality of microphones picked up respectively, based on the auscultation sound signal that a plurality of microphones picked up respectively, obtain target auscultation sound signal, thereby gather the auscultation sound signal through the multichannel, can realize the effect of auscultation sound signal reinforcing, realize the promotion of SNR, thereby promote the auscultation effect.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (11)
1. An acoustic signal acquisition method, applied to a stethoscope, the stethoscope including an auscultation diaphragm and a first audio acquisition device, the first audio acquisition device including a plurality of microphones, the method comprising:
when the auscultation diaphragm vibrates to drive air to vibrate, auscultation sound signals generated by the air vibration are picked up through the first audio acquisition device;
acquiring auscultation sound signals picked up by the plurality of microphones respectively;
obtaining a target auscultation sound signal based on the auscultation sound signals picked up by the plurality of microphones respectively.
2. The method of claim 1, wherein the stethoscope further comprises a second audio capture device, and wherein obtaining the target auscultation sound signal based on auscultation sound signals picked up by each of the plurality of microphones comprises:
acquiring an environmental noise signal acquired by the second audio acquisition device;
obtaining the target auscultation sound signal based on the auscultation sound signals picked up by the plurality of microphones respectively and the environmental noise signal.
3. The method of claim 2, wherein the obtaining the target auscultation sound signal based on the auscultation sound signal and the ambient noise signal picked up by each of the plurality of microphones comprises:
synthesizing the auscultation sound signals picked up by the plurality of microphones respectively to obtain synthesized sound signals;
and filtering the synthesized sound signal based on the environment noise signal to obtain the target auscultation sound signal.
4. The method of claim 3, wherein the synthesizing the auscultatory sound signals picked up by the plurality of microphones respectively to obtain a synthesized sound signal comprises:
acquiring weights corresponding to auscultation sound signals picked up by the plurality of microphones respectively, wherein the sum of the weights corresponding to the auscultation sound signals picked up by the plurality of microphones respectively is 1;
obtaining weighted sound signals corresponding to the auscultated sound signals picked up by the plurality of microphones respectively based on the auscultated sound signals picked up by the plurality of microphones respectively and the weights corresponding to the auscultated sound signals picked up by the plurality of microphones respectively;
and synthesizing weighted sound signals corresponding to the auscultation sound signals picked up by the plurality of microphones respectively to obtain the synthesized sound signals.
5. The method according to claim 4, wherein the synthesizing the weighted sound signals corresponding to the auscultation sound signals picked up by the plurality of microphones respectively to obtain the synthesized sound signals comprises:
by SCombination of Chinese herbs＝ω1×S1...+ωn×SnSynthesizing weighted sound signals corresponding to the auscultation sound signals picked up by the plurality of microphones respectively to obtain the synthesized sound signals, wherein SCombination of Chinese herbsFor synthesizing acoustic signals, omegan×SnFor weighting acoustic signals, SnFor auscultating acoustic signals, omeganN is an integer greater than or equal to 2, which is the weight corresponding to the auscultated sound signal.
6. The method of claim 5, wherein the filtering the synthesized sound signal based on the ambient noise signal to obtain the target auscultated sound signal comprises:
by SEyes of a user＝SCombination of Chinese herbs-α×SNoise reductionFiltering the synthesized sound signal based on the environmental noise signal to obtain the target auscultation sound signal, wherein SEyes of a userAuscultating the acoustic signal for the target, SNoise reductionIs an environment noise signal, alpha is a filter factor of the environment noise signal, and alpha is more than 0 and less than or equal to 1.
7. The method of claim 4, wherein the obtaining weights corresponding to auscultation sound signals picked up by each of the plurality of microphones comprises:
acquiring the variance of the signal-to-noise ratio corresponding to each auscultation sound signal picked up by each microphone in a target time period;
and acquiring weights corresponding to the auscultation sound signals picked up by the plurality of microphones respectively based on the variance of the signal-to-noise ratios corresponding to the auscultation sound signals picked up by the plurality of microphones respectively in the target time period.
8. The method of claim 7, wherein the obtaining weights corresponding to the auscultation sound signals picked up by each of the plurality of microphones based on a variance of a signal-to-noise ratio corresponding to each of the auscultation sound signals picked up by each of the plurality of microphones during the target time period comprises:
based on
Obtaining weights corresponding to auscultation sound signals picked up by the plurality of microphones respectively, wherein omegaiThe weight corresponding to the ith auscultated sound signal,
is the variance of the signal-to-noise ratio corresponding to the ith auscultation sound signal, wherein 1 is an integer greater than or equal to 1, and n is an integer greater than or equal to 2.
9. An acoustic signal acquisition device, characterized in that, is applied to the stethoscope, the stethoscope includes auscultation vibrating diaphragm and first audio acquisition device, first audio acquisition device includes a plurality of microphones, the device includes:
the pickup control module is used for picking up auscultation sound signals generated by air vibration through the first audio acquisition device when the auscultation diaphragm vibrates to drive the air to vibrate;
an auscultation sound signal acquisition module for acquiring auscultation sound signals picked up by the plurality of microphones respectively;
a target auscultation sound signal obtaining module, configured to obtain a target auscultation sound signal based on the auscultation sound signals picked up by the microphones respectively.
10. A stethoscope, comprising a memory and a processor, the memory coupled to the processor, the memory storing instructions that, when executed by the processor, the processor performs the method of any of claims 1-8.
11. A computer-readable storage medium, having stored thereon program code that can be invoked by a processor to perform the method according to any one of claims 1 to 8.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2014234A1 (en) * | 2007-06-04 | 2009-01-14 | Universita'degli Studi Di Milano | Auscultation device with high ambient noise rejection and operating method thereof |
| CN102088912A (en) * | 2008-07-11 | 2011-06-08 | 阿尔卡特朗讯 | An application server for reducing ambiance noise in an auscultation signal, and for recording comments while auscultating a patient with an electronic stethoscope |
| US20110137209A1 (en) * | 2009-11-04 | 2011-06-09 | Lahiji Rosa R | Microphone arrays for listening to internal organs of the body |
| KR101407049B1 (en) * | 2013-01-16 | 2014-06-24 | 이병훈 | An apparatus and method of extracting body signals from signals including noise signals and detected by a stethoscope |
| CN208447630U (en) * | 2017-10-17 | 2019-02-01 | 歌尔科技有限公司 | A kind of stethoscope |
| US20190183450A1 (en) * | 2017-12-20 | 2019-06-20 | International Business Machines Corporation | Monitoring body sounds and detecting health conditions |
| CN111132620A (en) * | 2017-09-28 | 2020-05-08 | 聿信医疗科技股份有限公司 | Networking electronic stethoscope system |
| CN111544030A (en) * | 2020-05-20 | 2020-08-18 | 京东方科技集团股份有限公司 | Stethoscope, diagnosis device and diagnosis method |
| US20210030390A1 (en) * | 2018-04-20 | 2021-02-04 | Ai Health Highway India Private Limited | Electronic stethoscope |
| CN113520449A (en) * | 2020-04-13 | 2021-10-22 | 中国人民解放军海军特色医学中心 | Electronic auscultation system and method |
-
2022
- 2022-02-08 CN CN202210119158.5A patent/CN114515164A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2014234A1 (en) * | 2007-06-04 | 2009-01-14 | Universita'degli Studi Di Milano | Auscultation device with high ambient noise rejection and operating method thereof |
| CN102088912A (en) * | 2008-07-11 | 2011-06-08 | 阿尔卡特朗讯 | An application server for reducing ambiance noise in an auscultation signal, and for recording comments while auscultating a patient with an electronic stethoscope |
| US20110137209A1 (en) * | 2009-11-04 | 2011-06-09 | Lahiji Rosa R | Microphone arrays for listening to internal organs of the body |
| KR101407049B1 (en) * | 2013-01-16 | 2014-06-24 | 이병훈 | An apparatus and method of extracting body signals from signals including noise signals and detected by a stethoscope |
| CN111132620A (en) * | 2017-09-28 | 2020-05-08 | 聿信医疗科技股份有限公司 | Networking electronic stethoscope system |
| CN208447630U (en) * | 2017-10-17 | 2019-02-01 | 歌尔科技有限公司 | A kind of stethoscope |
| US20190183450A1 (en) * | 2017-12-20 | 2019-06-20 | International Business Machines Corporation | Monitoring body sounds and detecting health conditions |
| US20210030390A1 (en) * | 2018-04-20 | 2021-02-04 | Ai Health Highway India Private Limited | Electronic stethoscope |
| CN113520449A (en) * | 2020-04-13 | 2021-10-22 | 中国人民解放军海军特色医学中心 | Electronic auscultation system and method |
| CN111544030A (en) * | 2020-05-20 | 2020-08-18 | 京东方科技集团股份有限公司 | Stethoscope, diagnosis device and diagnosis method |
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