CN114501282A - External squeal suppression method and device for hearing aid - Google Patents
External squeal suppression method and device for hearing aid Download PDFInfo
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Abstract
The invention provides a method and equipment for suppressing external howling of a hearing aid. The method comprises the following steps: the method comprises the steps of obtaining a first frame audio by framing a received first audio, judging the first frame audio frame by frame to determine the content of the received first audio, obtaining the content of a second audio similarly, if the content of the first audio is the same as that of the second audio, determining the second audio to be the external squeal of the hearing aid, and synthesizing the first amplified audio and the second amplified audio to finish the suppression of the external squeal of the hearing aid. The invention can effectively inhibit the external squeal of the hearing aid and improve the user experience of hearing-impaired patients for acquiring external sound by using the hearing aid.
Description
Technical Field
The embodiment of the invention relates to the technical field of hearing aid filtering, in particular to a method and equipment for suppressing external howling of a hearing aid.
Background
Wearing a hearing aid is the best solution for hearing impaired patients to recover hearing. During use of the hearing aid, due to the high integration and small volume of the digital hearing aid, the signal output from the speaker may easily leak out of the gap between the ear plug and the ear canal or the vent of the hearing aid. The leaked sound signal is picked up again by the microphone and output again from the loudspeaker, and the process forms a closed feedback loop. When the gain of the whole system is too large and meets a certain phase condition, the system is unstable, and finally the hearing aid is caused to generate external squeal, so that the use experience of hearing-impaired patients on the hearing aid is influenced. Therefore, it is an urgent technical problem in the art to develop a method and apparatus for suppressing external howling of a hearing aid, which can effectively overcome the above-mentioned drawbacks in the related art.
Disclosure of Invention
In view of the foregoing problems in the prior art, embodiments of the present invention provide a method and an apparatus for suppressing external howling in a hearing aid.
In a first aspect, an embodiment of the present invention provides a method for suppressing external howling of a hearing aid, including: the method comprises the steps of framing a received first audio to obtain a first framed audio, judging the first framed audio frame by frame to determine the content of the received first audio, storing the content of the first audio in a cache module, shunting the first audio to an operational amplifier, and outputting the first audio to human ears; framing the received second audio to obtain second framed audio, and judging the second framed audio frame by frame to determine the content of the received second audio; comparing the content of the first audio stored in the cache module with the content of the second audio, and if the content of the first audio is the same as the content of the second audio, determining that the second audio is the external squeal of the hearing aid; and shunting the second audio to the operational amplifier and the inverse operational amplifier to respectively obtain a first amplified audio and a second amplified audio, and synthesizing the first amplified audio and the second amplified audio to finish the inhibition of the external howling of the hearing aid.
On the basis of the content of the above method embodiment, the method for suppressing external howling of a hearing aid provided in an embodiment of the present invention includes framing a received first audio to obtain a first framed audio, including: each word in the first audio is decomposed into a plurality of phonemes, each phoneme in the plurality of phonemes is decomposed into a plurality of state points, each state point is a frame of the first audio, and all the frames form first frame-divided audio.
On the basis of the content of the above method embodiment, the method for suppressing external howling of a hearing aid provided in an embodiment of the present invention, where the determining, frame by frame, the content of the received first audio by judging the first frame-divided audio includes: calling all frame states from a sentence library, acquiring the probability that a first frame in first frame audio belongs to each frame state, selecting the frame state probability corresponding to the maximum probability as the state probability of the first frame, determining the state probability of a second frame on the basis of the state probability of the first frame, determining the state probability of each target frame on the basis of a front frame and a rear frame adjacent to each target frame from a third frame, determining the state probability of the first frame audio according to the state probability of the first frame, the state probability of the second frame and the state probability of each target frame, and determining the content of the first audio according to the state probability of the first frame audio.
Based on the above description of the embodiments of the method, the method for suppressing external howling of a hearing aid provided in an embodiment of the present invention includes obtaining a probability that a first frame in a first frame audio belongs to each frame state, selecting a frame state probability corresponding to a maximum probability as a state probability of the first frame, determining a state probability of a second frame based on the state probability of the first frame, and determining a state probability of each target frame based on a previous frame and a subsequent frame adjacent to each target frame from a third frame, including:
wherein the content of the first and second substances,
is the first frame of the video data to be displayed,
in the case of the second frame, the frame is,
in the case of the (n-1) th frame,
for the (n-2) th frame,
in the case of the n-th frame,
the state probability of the first frame, max is taken to be the maximum value,
the state probability that the first frame is in the s-th frame state,
the S-th frame state of all frame states called from the sentence library, S is the number of all frame states,
for the state probability of the second frame after the state probability of the first frame is determined,
the probability of a state where the first frame and the second frame occur simultaneously,
the state probabilities of the nth frame after the determination of the state probabilities of the (n-1) th frame and the (n-2) th frame,
the probability of the state of the simultaneous occurrence of the n-1 st frame, the n-2 nd frame and the n-th frame,
and N is the number of all frames in the first frame audio, wherein N is the probability of the state of the simultaneous occurrence of the (N-1) th frame and the (N-2) th frame.
Based on the above description of the embodiments of the method, the method for suppressing external howling of a hearing aid provided in an embodiment of the present invention, where the determining the state probability of the first frame audio according to the state probability of the first frame, the state probability of the second frame and the state probability of each target frame includes:
wherein the content of the first and second substances,
is the state probability of the first framed audio,
the product is taken from the state probability of the third frame to the state probability of the nth frame.
On the basis of the content of the above method embodiment, the method for suppressing external howling of a hearing aid provided in the embodiment of the present invention includes splitting the second audio into the operational amplifier and the inverting operational amplifier to obtain the first amplified audio and the second amplified audio, and synthesizing the first amplified audio and the second amplified audio to complete suppression of external howling of the hearing aid, including: the voice shunt is opened in a shunting mode, the second audio is sent to the operational amplifier and the reverse operational amplifier at the same time, the operational amplifier conducts forward amplification on the received second audio to obtain first amplified audio and sends the first amplified audio to the synthesizer, the reverse operational amplifier conducts reverse amplification on the received second audio to obtain second amplified audio and sends the second amplified audio to the synthesizer, the synthesizer synthesizes the first amplified audio and the second amplified audio, the first amplified audio and the second amplified audio are eliminated at the same time, and inhibition of external squeal of the hearing aid is completed.
In a second aspect, an embodiment of the present invention provides a hearing aid external howling suppression system, including: the framing module is used for framing the received audio to obtain framed audio; the word judgment module is used for carrying out probability matching on the framing audio and the frame state called in the sentence library, determining the content of the received audio and temporarily storing the content of the audio in the cache module; the comparison module is used for comparing the content of the second audio with the content of the first audio temporarily stored in the cache module and determining whether the content of the first audio is the same as the content of the second audio; the sentence library is used for storing the probability matching between the frame state and each frame of the frame audio; the voice splitter is used for respectively sending the external howling audio to the operational amplifier and the inverse operational amplifier after determining that the external howling exists, or sending the common audio to the operational amplifier; the operational amplifier is used for carrying out forward amplification on the received audio; the inverse operational amplifier is used for inversely amplifying the received audio; the synthesizer is used for synthesizing the audio emitted by the operational amplifier and the inverting operational amplifier; a controller for implementing the hearing aid external howling suppression method according to any one of the preceding method embodiments.
In a third aspect, an embodiment of the present invention provides a hearing aid external howling suppression apparatus, including: the first main module is used for framing the received first audio to obtain first framed audio, judging the first framed audio frame by frame to determine the content of the received first audio, storing the content of the first audio in the cache module, shunting the first audio to the operational amplifier and outputting the first audio to human ears; the second main module is used for framing the received second audio to obtain a second framed audio, and judging the second framed audio frame by frame to determine the content of the received second audio; the third main module is used for comparing the content of the first audio and the content of the second audio stored in the cache module, and if the content of the first audio is the same as the content of the second audio, determining that the second audio is the external squeal of the hearing aid; and the fourth main module is used for shunting the second audio to the operational amplifier and the inverting operational amplifier to respectively obtain a first amplified audio and a second amplified audio, and synthesizing the first amplified audio and the second amplified audio to finish the inhibition of the external squeal of the hearing aid.
In a fourth aspect, an embodiment of the present invention provides an electronic device, including:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method for suppressing external howling of a hearing aid as provided in any of the various implementations of the first aspect.
In a fifth aspect, embodiments of the present invention provide a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform a method for suppressing external howling in a hearing aid according to any one of the various implementations of the first aspect.
According to the method and the device for suppressing the external howling of the hearing aid, provided by the embodiment of the invention, the received first audio is framed to obtain the first framed audio, the content of the received first audio is determined by judging the first framed audio frame by frame and the content of the second audio is obtained similarly, if the content of the first audio is the same as the content of the second audio, the second audio is determined to be the external howling of the hearing aid, the first amplified audio and the second amplified audio are synthesized, the suppression of the external howling of the hearing aid is completed, the external howling of the hearing aid can be effectively suppressed, and the user experience of hearing-impaired patients for obtaining external sounds by using the hearing aid is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below to the drawings required for the description of the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of a method for suppressing external howling in a hearing aid according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an external howling suppression device of a hearing aid according to an embodiment of the present invention;
fig. 3 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an external howling suppression system of a hearing aid according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In addition, technical features of various embodiments or individual embodiments provided by the present invention may be arbitrarily combined with each other to form a feasible technical solution, and such combination is not limited by the sequence of steps and/or the structural composition mode, but must be realized by a person skilled in the art, and when the technical solution combination is contradictory or cannot be realized, such a technical solution combination should not be considered to exist and is not within the protection scope of the present invention.
An embodiment of the present invention provides a method for suppressing external howling of a hearing aid, and referring to fig. 1, the method includes: the method comprises the steps of framing a received first audio to obtain a first framed audio, judging the first framed audio frame by frame to determine the content of the received first audio, storing the content of the first audio in a cache module, shunting the first audio to an operational amplifier, and outputting the first audio to human ears; framing the received second audio to obtain a second framed audio, and judging the second framed audio frame by frame to determine the content of the received second audio; comparing the content of the first audio stored in the cache module with the content of the second audio, and if the content of the first audio is the same as the content of the second audio, determining that the second audio is the external squeal of the hearing aid; and shunting the second audio to the operational amplifier and the inverse operational amplifier to respectively obtain a first amplified audio and a second amplified audio, and synthesizing the first amplified audio and the second amplified audio to finish the inhibition of the external howling of the hearing aid. It should be noted that the first audio and the second audio are only sounds input at different times, and may be the same or different, and if they are the same, it is determined that the second audio is an external squeal generated by the first audio leaking out of the hearing aid.
Based on the content of the foregoing method embodiment, as an alternative embodiment, the method for suppressing external howling of a hearing aid provided in the embodiment of the present invention includes: each word in the first audio is decomposed into a plurality of phonemes, each phoneme in the plurality of phonemes is decomposed into a plurality of state points, each state point is a frame of the first audio, and all the frames form first frame-divided audio. It should be noted that the state point represents the pronunciation content represented by a frame in the first frame audio, and the technical means adopted by the second audio and the first audio in the frame processing process are the same, i.e. the acquisition process of the second frame audio is the same as that of the first frame audio, and therefore, the details are not repeated herein.
Based on the content of the foregoing method embodiment, as an optional embodiment, the method for suppressing external howling of a hearing aid provided in the embodiment of the present invention, where the determining, by frame, the content of the received first audio by judging, by frame, the first frame-divided audio includes: calling all frame states from a sentence library, acquiring the probability that a first frame in first frame audio belongs to each frame state, selecting the frame state probability corresponding to the maximum probability as the state probability of the first frame, determining the state probability of a second frame on the basis of the state probability of the first frame, determining the state probability of each target frame on the basis of a front frame and a rear frame adjacent to each target frame from a third frame, determining the state probability of the first frame audio according to the state probability of the first frame, the state probability of the second frame and the state probability of each target frame, and determining the content of the first audio according to the state probability of the first frame audio. It should be noted that, the technical means adopted for determining the content of the received second audio by judging the second framed audio frame by frame is the same as the technical means adopted for determining the content of the received first audio by judging the first framed audio frame by frame, and therefore, the details are not repeated here. The sentence library stores a large amount of frame states in advance, and the frame states are different phonemes corresponding to different words (phonemes of words with similar pronunciations may have partial phonemes crossed) and different states corresponding to different phonemes (namely, frames, partial frames may also have partial crossings between partial frames due to possible crossings of phonemes) according to experience, and then the frame states are stored in the sentence library in advance. Each target frame refers to each frame in the first framed audio (or the second framed audio) from the third frame until the final frame for which a state probability needs to be determined.
Based on the content of the foregoing method embodiment, as an alternative embodiment, the method for suppressing hearing aid external howling provided in this embodiment of the present invention includes obtaining a probability that a first frame in a first frame audio belongs to each frame state, selecting a frame state probability corresponding to a maximum probability as a state probability of the first frame, determining a state probability of a second frame based on the state probability of the first frame, and determining a state probability of each target frame based on a previous frame and a subsequent frame adjacent to each target frame from a third frame, where the method includes:
wherein the content of the first and second substances,
in the case of the first frame,
in the case of the second frame, the frame is,
in the case of the (n-1) th frame,
for the (n-2) th frame,
in the case of the n-th frame,
the state probability of the first frame, max is taken to be the maximum value,
the state probability that the first frame is in the s-th frame state,
the S-th frame state of all frame states called from the sentence library, S is the number of all frame states,
for the state probability of the second frame after the state probability of the first frame is determined,
the probability of a state where the first frame and the second frame occur simultaneously,
the state probabilities of the nth frame after the determination of the state probabilities of the (n-1) th frame and the (n-2) th frame,
the probability of the state of the simultaneous occurrence of the n-1 st frame, the n-2 nd frame and the n-th frame,
for the (n-1) th frame and the (n-2) th frameThe probability of simultaneous occurrence, N, is the number of all frames in the first framed audio. It should be noted that the sentence library stores the pre-calculated occurrence probability (i.e., state probability, including the conditional probability before and after the occurrence of each frame) of each frame, after the first frame of the first frame audio (or the second frame audio) is obtained, only the probability (i.e., state probability) of each frame state corresponding to the first frame needs to be searched in the sentence library, and then the maximum value of the state probability (as shown in formula (1)) is taken to determine the state point corresponding to the first frame. The determination of the second frame is linked with the state point of the first frame (the principle is that when a person speaks, a word sent out before is linked with an adjacent word, so that the content of a word behind can be determined more accurately under the condition of determining the word ahead), so that the state point of the second frame can be determined only under the condition of determining the state point of the first frame, and the state probability of the second frame after the state probability of the first frame is determined is integrated by the conditional probability of the formula (2). Similarly, the state probability of each subsequent target frame is obtained based on the state probabilities of the adjacent frames (i.e., the previous frame and the next frame of the target frame), which can be specifically referred to as formula (3).
Based on the content of the foregoing method embodiment, as an alternative embodiment, the method for suppressing hearing aid external howling provided in this embodiment of the present invention, where determining the state probability of the first frame audio according to the state probability of the first frame, the state probability of the second frame, and the state probability of each target frame includes:
wherein the content of the first and second substances,
is the state probability of the first framed audio,
the product is taken from the state probability of the third frame to the state probability of the nth frame. It should be noted that the state probability of the first frame audio is determinedThe state points of each frame of the first frame audio and the phonemes obtained according to the state points are determined, and all words (namely, contents) of the first audio are determined according to the phonemes. For example, if the state probability of the first framed audio determined according to equation (4) exceeds 0.5 (which may exceed 0.6, 0.7, 0.8, or 0.9 in another embodiment), it is stated that the state points of each frame determined according to the state probabilities of the respective frames are correct, i.e., the state content of each frame of the first framed audio is determined, and thus the content of the first audio is determined. The corresponding processing of the second framed audio applies equally to equations (1) through (4), except that the frames represent meaning frames in the second framed audio.
Based on the content of the foregoing method embodiment, as an optional embodiment, the method for suppressing external howling of a hearing aid provided in the embodiment of the present invention includes splitting the second audio into an operational amplifier and an inverting operational amplifier to obtain a first amplified audio and a second amplified audio, and synthesizing the first amplified audio and the second amplified audio to complete suppression of external howling of the hearing aid, including: the voice shunt is opened in a shunting mode, the second audio is sent to the operational amplifier and the reverse operational amplifier at the same time, the operational amplifier conducts forward amplification on the received second audio to obtain first amplified audio and sends the first amplified audio to the synthesizer, the reverse operational amplifier conducts reverse amplification on the received second audio to obtain second amplified audio and sends the second amplified audio to the synthesizer, the synthesizer synthesizes the first amplified audio and the second amplified audio, the first amplified audio and the second amplified audio are eliminated at the same time, and inhibition of external squeal of the hearing aid is completed. It should be noted that the phases of the second amplified audio and the first amplified audio after being reversely amplified by the inverting operational amplifier are opposite, so that the two amplified audio can be mutually cancelled after being synthesized, so that the second audio (i.e. the external howling of the first audio) is eliminated, and the external howling is suppressed.
According to the external howling suppression method for the hearing aid, provided by the embodiment of the invention, the received first audio is framed to obtain a first framed audio, the content of the received first audio is determined by judging the first framed audio frame by frame and similarly the content of the second audio is obtained, if the content of the first audio is the same as that of the second audio, the second audio is determined to be the external howling of the hearing aid, the first amplified audio and the second amplified audio are synthesized, the suppression of the external howling of the hearing aid is completed, the external howling of the hearing aid can be effectively suppressed, and the user experience of hearing-impaired patients for obtaining external sounds by using the hearing aid is improved.
An embodiment of the present invention provides a hearing aid external howling suppression system, and referring to fig. 4, the system includes: the framing module is used for framing the received audio to obtain framed audio; the word judgment module is used for carrying out probability matching on the framing audio and the frame state called in the sentence library, determining the content of the received audio and temporarily storing the content of the audio in the cache module; the comparison module is used for comparing the content of the second audio with the content of the first audio temporarily stored in the cache module and determining whether the content of the first audio is the same as the content of the second audio; the sentence library is used for storing the probability matching between the frame state and each frame of the frame audio; the voice splitter is used for respectively sending the external howling audio to the operational amplifier and the inverse operational amplifier after determining that the external howling exists, or sending the common audio to the operational amplifier; an operational amplifier a1 for forward-amplifying the received audio; an inverting operational amplifier a2 for inverting the received audio; a synthesizer C1 for synthesizing the audio from the operational amplifier and the inverting operational amplifier; a controller for implementing a hearing aid external howling suppression method according to any one of the preceding method embodiments. The shunt resistor R1 and the shunt resistor R2 are used to limit the current flowing through the operational amplifier a1, and thus function to protect the operational amplifier a 1. The shunt resistor R3 and the shunt resistor R4 are used to limit the current flowing through the inverting operational amplifier a2, and thus, the inverting operational amplifier a2 is protected.
The implementation basis of the various embodiments of the present invention is realized by programmed processing performed by a device having a processor function. Therefore, in engineering practice, the technical solutions and functions thereof of the embodiments of the present invention can be packaged into various modules. Based on this reality, on the basis of the above embodiments, embodiments of the present invention provide a hearing aid external howling suppression apparatus for performing the hearing aid external howling suppression method in the above method embodiments. Referring to fig. 2, the apparatus includes: the first main module is used for framing the received first audio to obtain a first framed audio, judging the first framed audio frame by frame to determine the content of the received first audio, storing the content of the first audio in the cache module, shunting the first audio to the operational amplifier and outputting the first audio to human ears; the second main module is used for framing the received second audio to obtain second framed audio, and judging the second framed audio frame by frame to determine the content of the received second audio; the third main module is used for comparing the content of the first audio and the content of the second audio stored in the cache module, and if the content of the first audio is the same as the content of the second audio, determining that the second audio is the external squeal of the hearing aid; and the fourth main module is used for shunting the second audio to the operational amplifier and the inverting operational amplifier to respectively obtain a first amplified audio and a second amplified audio, and synthesizing the first amplified audio and the second amplified audio to finish the inhibition of the external squeal of the hearing aid.
The external howling suppression device for the hearing aid, provided by the embodiment of the invention, adopts a plurality of modules in fig. 2, obtains a first frame-divided audio by framing a received first audio, judges the first frame-divided audio frame by frame to determine the content of the received first audio, and similarly obtains the content of a second audio, if the content of the first audio is the same as that of the second audio, determines the second audio as the external howling of the hearing aid, synthesizes the first amplified audio and the second amplified audio, completes suppression of the external howling of the hearing aid, can effectively suppress the external howling of the hearing aid, and improves the user experience of a hearing-impaired patient for obtaining external sounds by using the hearing aid.
It should be noted that, the apparatus in the apparatus embodiment provided by the present invention may be used for implementing methods in other method embodiments provided by the present invention, except that corresponding function modules are provided, and the principle of the apparatus embodiment provided by the present invention is basically the same as that of the apparatus embodiment provided by the present invention, so long as a person skilled in the art obtains corresponding technical means by combining technical features on the basis of the apparatus embodiment described above, and obtains a technical solution formed by these technical means, on the premise of ensuring that the technical solution has practicability, the apparatus in the apparatus embodiment described above may be modified, so as to obtain a corresponding apparatus class embodiment, which is used for implementing methods in other method class embodiments. For example:
based on the content of the foregoing device embodiment, as an optional embodiment, the hearing aid external howling suppression device provided in the embodiment of the present invention further includes: the first sub-module is configured to perform framing on the received first audio to obtain a first framed audio, and includes: each word in the first audio is decomposed into a plurality of phonemes, each phoneme in the plurality of phonemes is decomposed into a plurality of state points, each state point is a frame of the first audio, and all the frames form first frame-divided audio.
Based on the content of the foregoing device embodiment, as an optional embodiment, the apparatus for suppressing external howling of a hearing aid provided in the embodiment of the present invention further includes: the second sub-module is configured to determine the content of the received first audio by performing frame-by-frame judgment on the first framed audio, and includes: calling all frame states from a sentence library, acquiring the probability that a first frame in first frame audio belongs to each frame state, selecting the frame state probability corresponding to the maximum probability as the state probability of the first frame, determining the state probability of a second frame on the basis of the state probability of the first frame, determining the state probability of each target frame on the basis of a front frame and a rear frame adjacent to each target frame from a third frame, determining the state probability of the first frame audio according to the state probability of the first frame, the state probability of the second frame and the state probability of each target frame, and determining the content of the first audio according to the state probability of the first frame audio.
Based on the content of the foregoing device embodiment, as an optional embodiment, the hearing aid external howling suppression device provided in the embodiment of the present invention further includes: a third sub-module, configured to implement the obtaining of the probability that the first frame in the first frame audio belongs to each frame state, select a frame state probability corresponding to a maximum probability as the state probability of the first frame, determine the state probability of the second frame based on the state probability of the first frame, and determine the state probability of each target frame based on a previous frame and a subsequent frame adjacent to each target frame from a third frame, where the third sub-module includes:
wherein the content of the first and second substances,
in the case of the first frame,
in the case of the second frame, the frame is,
is the (n-1) th frame,
for the (n-2) th frame,
in the case of the n-th frame,
the state probability of the first frame, max is taken to be the maximum value,
is a firstThe state probability that a frame is in the s-th frame state,
the S-th frame state of all frame states called from the sentence library, S is the number of all frame states,
for the state probability of the second frame after the state probability of the first frame is determined,
the probability of a state where the first frame and the second frame occur simultaneously,
the state probabilities of the nth frame after the determination of the state probabilities of the (n-1) th frame and the (n-2) th frame,
the probability of the state of the simultaneous occurrence of the n-1 st frame, the n-2 nd frame and the n-th frame,
and N is the number of all frames in the first frame audio, wherein N is the probability of the state of the simultaneous occurrence of the (N-1) th frame and the (N-2) th frame.
Based on the content of the foregoing device embodiment, as an optional embodiment, the hearing aid external howling suppression device provided in the embodiment of the present invention further includes: the fourth sub-module is configured to determine the state probability of the first frame audio according to the state probability of the first frame, the state probability of the second frame, and the state probability of each target frame, and includes:
wherein the content of the first and second substances,
is the state probability of the first framed audio,
the product is taken from the state probability of the third frame to the state probability of the nth frame.
Based on the content of the foregoing device embodiment, as an optional embodiment, the hearing aid external howling suppression device provided in the embodiment of the present invention further includes: a fifth sub-module, configured to shunt the second audio to the operational amplifier and the inverting operational amplifier, obtain a first amplified audio and a second amplified audio, and combine the first amplified audio and the second amplified audio to complete suppression of external howling of the hearing aid, including: the voice shunt is opened in a shunting mode, the second audio is sent to the operational amplifier and the reverse operational amplifier at the same time, the operational amplifier conducts forward amplification on the received second audio to obtain first amplified audio and sends the first amplified audio to the synthesizer, the reverse operational amplifier conducts reverse amplification on the received second audio to obtain second amplified audio and sends the second amplified audio to the synthesizer, the synthesizer synthesizes the first amplified audio and the second amplified audio, the first amplified audio and the second amplified audio are eliminated at the same time, and inhibition of external squeal of the hearing aid is completed.
The method of the embodiment of the invention is realized by depending on the electronic equipment, so that the related electronic equipment is necessarily introduced. To this end, an embodiment of the present invention provides an electronic apparatus, as shown in fig. 3, including: the system comprises at least one processor (processor), a communication Interface (communication Interface), at least one memory (memory) and a communication bus, wherein the at least one processor, the communication Interface and the at least one memory are communicated with each other through the communication bus. The at least one processor may invoke logic instructions in the at least one memory to perform all or a portion of the steps of the methods provided by the various method embodiments described above.
In addition, the logic instructions in the at least one memory may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the method embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. Based on this recognition, each block in the flowchart or block diagrams may represent a module, a program segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In this patent, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A hearing aid external howling suppression method, comprising: the method comprises the steps of framing a received first audio to obtain a first framed audio, judging the first framed audio frame by frame to determine the content of the received first audio, storing the content of the first audio in a cache module, shunting the first audio to an operational amplifier and outputting the first audio to human ears; framing the received second audio to obtain second framed audio, and judging the second framed audio frame by frame to determine the content of the received second audio; comparing the content of the first audio stored in the cache module with the content of the second audio, and if the content of the first audio is the same as the content of the second audio, determining that the second audio is the external squeal of the hearing aid; and shunting the second audio to the operational amplifier and the inverse operational amplifier to respectively obtain a first amplified audio and a second amplified audio, and synthesizing the first amplified audio and the second amplified audio to finish the inhibition of the external howling of the hearing aid.
2. The hearing aid howling suppression method according to claim 1, wherein said framing the received first audio to obtain a first framed audio comprises: each word in the first audio is decomposed into a plurality of phonemes, each phoneme in the plurality of phonemes is decomposed into a plurality of state points, each state point is a frame of the first audio, and all the frames form first frame-divided audio.
3. The hearing aid howling suppression method according to claim 2, wherein said determining the content of the received first audio frame by frame of the first framed audio comprises: calling all frame states from a sentence library, acquiring the probability that a first frame in first frame audio belongs to each frame state, selecting the frame state probability corresponding to the maximum probability as the state probability of the first frame, determining the state probability of a second frame on the basis of the state probability of the first frame, determining the state probability of each target frame on the basis of a front frame and a rear frame adjacent to each target frame from a third frame, determining the state probability of the first frame audio according to the state probability of the first frame, the state probability of the second frame and the state probability of each target frame, and determining the content of the first audio according to the state probability of the first frame audio.
4. The hearing aid external howling suppression method according to claim 3, wherein the obtaining of the probability that the first frame in the first framed audio belongs to each frame state, selecting the frame state probability corresponding to the maximum probability as the state probability of the first frame, determining the state probability of the second frame based on the state probability of the first frame, and determining the state probability of each target frame based on the previous frame and the next frame adjacent to each target frame from the third frame comprises:
wherein the content of the first and second substances,
in the case of the first frame,
in the case of the second frame, the frame is,
in the case of the (n-1) th frame,
for the (n-2) th frame,
in the case of the n-th frame,
the state probability of the first frame, max is taken to be the maximum value,
the state probability that the first frame is in the s-th frame state,
the S-th frame state of all frame states called from the sentence library, S is the number of all frame states,
for the state probability of the second frame after the state probability of the first frame is determined,
the probability of a state where the first frame and the second frame occur simultaneously,
the state probabilities of the nth frame after the determination of the state probabilities of the (n-1) th frame and the (n-2) th frame,
the probability of the state of the simultaneous occurrence of the n-1 st frame, the n-2 nd frame and the n-th frame,
and N is the number of all frames in the first frame audio, wherein N is the probability of the state of the simultaneous occurrence of the (N-1) th frame and the (N-2) th frame.
5. The hearing aid external howling suppression method according to claim 4, wherein determining the state probability of the first framed audio based on the state probability of the first frame, the state probability of the second frame and the state probability of each target frame comprises:
wherein the content of the first and second substances,
is the state probability of the first framed audio,
the product is taken from the state probability of the third frame to the state probability of the nth frame.
6. The method of claim 5, wherein the splitting the second audio into the operational amplifier and the inverting operational amplifier to obtain a first amplified audio and a second amplified audio, respectively, and combining the first amplified audio and the second amplified audio to achieve the suppression of the external howling of the hearing aid comprises: the voice shunt is opened in a shunting mode, the second audio is sent to the operational amplifier and the reverse operational amplifier at the same time, the operational amplifier conducts forward amplification on the received second audio to obtain first amplified audio and sends the first amplified audio to the synthesizer, the reverse operational amplifier conducts reverse amplification on the received second audio to obtain second amplified audio and sends the second amplified audio to the synthesizer, the synthesizer synthesizes the first amplified audio and the second amplified audio, the first amplified audio and the second amplified audio are eliminated at the same time, and inhibition of external squeal of the hearing aid is completed.
7. A hearing aid external howling suppression system, comprising: the framing module is used for framing the received audio to obtain framed audio; the word judgment module is used for carrying out probability matching on the framing audio and the frame state called in the sentence library, determining the content of the received audio and temporarily storing the content of the audio in the cache module; the comparison module is used for comparing the content of the second audio with the content of the first audio temporarily stored in the cache module and determining whether the content of the first audio is the same as the content of the second audio; the sentence library is used for storing the probability matching between the frame state and each frame of the frame audio; the voice splitter is used for respectively sending the external howling audio to the operational amplifier and the inverse operational amplifier after determining that the external howling exists, or sending the common audio to the operational amplifier; the operational amplifier is used for carrying out forward amplification on the received audio; the inverse operational amplifier is used for inversely amplifying the received audio; the synthesizer is used for synthesizing the audio emitted by the operational amplifier and the inverting operational amplifier; a controller for implementing a hearing aid external howling suppression method according to any one of claims 1 to 6.
8. An external howling suppressing device for a hearing aid, comprising: the first main module is used for framing the received first audio to obtain first framed audio, judging the first framed audio frame by frame to determine the content of the received first audio, storing the content of the first audio in the cache module, shunting the first audio to the operational amplifier and outputting the first audio to human ears; the second main module is used for framing the received second audio to obtain second framed audio, and judging the second framed audio frame by frame to determine the content of the received second audio; the third main module is used for comparing the content of the first audio and the content of the second audio stored in the cache module, and if the content of the first audio is the same as the content of the second audio, determining that the second audio is the external squeal of the hearing aid; and the fourth main module is used for shunting the second audio to the operational amplifier and the inverting operational amplifier to respectively obtain a first amplified audio and a second amplified audio, and synthesizing the first amplified audio and the second amplified audio to finish the inhibition of the external squeal of the hearing aid.
9. An electronic device, comprising:
at least one processor, at least one memory, and a communication interface; wherein, the first and the second end of the pipe are connected with each other,
the processor, the memory and the communication interface are communicated with each other;
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1 to 6.
10. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1 to 6.
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