CN116887158A - Method for suppressing howling of digital hearing aid by frequency conversion algorithm - Google Patents
Method for suppressing howling of digital hearing aid by frequency conversion algorithm Download PDFInfo
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- CN116887158A CN116887158A CN202310979365.2A CN202310979365A CN116887158A CN 116887158 A CN116887158 A CN 116887158A CN 202310979365 A CN202310979365 A CN 202310979365A CN 116887158 A CN116887158 A CN 116887158A
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- howling
- hearing aid
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- frequency
- digital hearing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
- H04R2225/43—Signal processing in hearing aids to enhance the speech intelligibility
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention relates to the technical field of digital hearing aids, and discloses a method for suppressing howling of a digital hearing aid by using a frequency conversion algorithm, which comprises the following steps: changing the sampling rate of the captured signal or the played signal; starting a digital hearing aid, and inputting a howling sound source; after the sound source is input, the frequency is changed, and meanwhile, the multi-point howling frequency point is blocked, so that the howling is restrained. The frequency conversion algorithm is used for the method for suppressing the howling of the digital hearing aid, the digital hearing aid is started by changing the sampling rate of a captured signal or a playing signal, the howling sound source is input, the frequency is changed after the sound source is input, meanwhile, the multi-point howling frequency point is blocked, the howling is suppressed, after the howling point is detected, the positive feedback loop of the howling point is eliminated by changing the frequency of the input or output audio digital signal of the whole frequency domain, the howling suppression is realized, the multi-point howling frequency point can be blocked at the same time, and the resource occupation is very small, so that the frequency conversion algorithm is particularly suitable for being used on Bluetooth digital hearing aids designed by Bluetooth single chips.
Description
Technical Field
The invention relates to the technical field of digital hearing aids, in particular to a method for suppressing howling of a digital hearing aid by using a frequency conversion algorithm.
Background
The digital hearing aid automatically collects the conditions of the acoustic signal types, the signal-to-noise ratio, the front microphone intensity and the rear microphone intensity difference and the like of the environment, defines different environments, and automatically adjusts the characteristics of noise reduction, direction, compression ratio and the like so as to adapt to the continuously-changing environment. The phenomenon that the user of the simulator cannot hear small sound and cannot hear large sound is avoided.
The digital hearing aid can synchronously input howling transmitted from the periphery in the use process, so that discomfort is caused to a wearer in terms of hearing, the existing mature digital hearing aid howling suppression algorithm reduces or completely traps the audio intensity of howling points, when a product has a plurality of howling points, the size of sound after the howling suppression is started can be obviously reduced, and the effect of the wearer in terms of hearing normal sound is affected.
Disclosure of Invention
The invention aims to provide a method for suppressing howling of a digital hearing aid by using a frequency conversion algorithm, so as to solve the problems in the background art.
In order to solve the technical problems, the invention provides the following technical scheme: a method for digital hearing aid squeal suppression using a frequency conversion algorithm, comprising the steps of: s1, changing the sampling rate of a captured signal or a playing signal;
s2, starting the digital hearing aid, and inputting a howling sound source;
s3, after the sound source is input, the frequency is changed, meanwhile, the multi-point howling frequency points are blocked, and howling is restrained.
Preferably, S1 comprises: s101, inputting a sampling rate of a captured signal or a playing signal according to a use requirement;
s102, performing rising tone or falling tone according to different sampling rates of the captured signal and the playing signal.
The sampling rate of the corresponding captured signals or playing signals is input according to different use requirements, so that the howling suppression degree can be adjusted according to different wearers and use environments, and the whole application range of the digital hearing aid is improved.
Preferably, S2 comprises: s201, inputting a howling sound source into an internal device through a radio structure of the digital hearing aid;
s202, the sound signal enters the device to be sampled and correspondingly changed according to the sampling rate.
The howling sound source is input through the digital hearing aid radio structure and is converted into an audio digital signal, so that frequency change can be rapidly carried out, and the howling suppression rate is improved.
Preferably, S3 comprises: s301, changing the frequency of an input audio digital signal, so that a positive feedback loop of a howling point is eliminated, and howling inhibition is realized;
s302, outputting the audio digital signal after howling inhibition through an output device, so that the audio digital signal is successfully heard by a wearer.
The howling point positive feedback loop is eliminated, thereby realizing howling inhibition, and the resource occupation is very little, and the method is particularly suitable for being used on a Bluetooth digital hearing aid designed by a Bluetooth single chip.
Preferably, the S202 sound signal entering the device may be sampled and adjusted for different howling sources in corresponding changes according to the sampling rate.
By correspondingly adjusting different howling sound sources, the suppression range and the suppression effect of the digital hearing aid can be improved.
Compared with the prior art, the invention provides a method for suppressing the howling of a digital hearing aid by using a frequency conversion algorithm, which has the following beneficial effects:
1. the frequency conversion algorithm is used for the method for suppressing the howling of the digital hearing aid, the digital hearing aid is started by changing the sampling rate of a captured signal or a playing signal, the howling sound source is input, the frequency is changed after the sound source is input, meanwhile, the multi-point howling frequency point is blocked, the howling is suppressed, after the howling point is detected, the positive feedback loop of the howling point is eliminated by changing the frequency of the input or output audio digital signal of the whole frequency domain, the howling suppression is realized, the multi-point howling frequency point can be blocked at the same time, and the resource occupation is very small, so that the frequency conversion algorithm is particularly suitable for being used on Bluetooth digital hearing aids designed by Bluetooth single chips.
2. According to the method for suppressing the howling of the digital hearing aid by using the frequency conversion algorithm, through the sampling rate which can be manually set, the whole range of the howling suppression can be adjusted according to different environments and the use requirements of different wearers, and therefore the application range is improved.
Drawings
Fig. 1 is a schematic flow chart of a method for suppressing howling of a digital hearing aid by using a frequency conversion algorithm according to the present invention;
FIG. 2 is a schematic diagram of a flow chart of setting a sampling rate in the present invention;
FIG. 3 is a diagram showing the flow structure of a howling-accepting source in the present invention;
fig. 4 is a schematic diagram of a howling suppression and output flow structure in the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, the present invention provides the following technical solutions: a method for digital hearing aid squeal suppression using a frequency conversion algorithm, comprising the steps of: s1, changing the sampling rate of a captured signal or a playing signal;
s2, starting the digital hearing aid, and inputting a howling sound source;
s3, after the sound source is input, the frequency is changed, meanwhile, the multi-point howling frequency points are blocked, and howling is restrained.
According to the technical scheme, the digital hearing aid is started by changing the sampling rate of the captured signal or the playing signal, the howling sound source is input, the frequency is changed after the sound source is input, the multi-point howling frequency point is blocked, the howling is restrained, after the howling point is detected, the positive feedback loop of the howling point is eliminated by changing the frequency of the input or output audio digital signal of the whole frequency domain, the howling restraint is realized, the multi-point howling frequency point can be blocked at the same time, the resource occupation is very little, and the method is particularly suitable for being used on Bluetooth digital hearing aids designed by Bluetooth single chips.
By taking a time domain method, namely a resampling method as a basic principle, a resampling factor is assumed to be P/Q, wherein P is an up-sampling factor, and Q is a down-sampling factor. The up-sampling process is to interpolate P-1 sampling points between two adjacent points of original signal, so that the pitch period is changed to original P times, the frequency spectrum is compressed to original 1/P times, the duration is changed to original P times, namely the fundamental frequency is changed to original 1/P times, the tone is reduced to original 1/P times, the speech speed is changed to original 1/P times, and the down-sampling process is to extract every Q-1 point, so that the pitch period length is changed to original 1/Q times, the frequency spectrum is expanded to original Q times, the duration is changed to original 1/Q times, namely the fundamental frequency is changed to original Q times, the pitch is increased to original Q times, the speech speed is changed to original Q times, and after the two processes are combined, the playing speed is kept unchanged, and the resampled speech speed and the pitch are changed to original Q/P times
Specifically, S1 includes: s101, inputting a sampling rate of a captured signal or a playing signal according to a use requirement;
s102, performing rising tone or falling tone according to different sampling rates of the captured signal and the playing signal.
Through the technical scheme, the corresponding sampling rate of the captured signal or the playing signal is input according to different use requirements, so that the howling suppression degree can be adjusted according to different wearers and use environments, and the whole application range of the digital hearing aid is improved.
Specifically, S2 includes: s201, inputting a howling sound source into an internal device through a radio structure of the digital hearing aid;
s202, the sound signal enters the device to be sampled and correspondingly changed according to the sampling rate.
Through the technical scheme, the howling sound source is input through the digital hearing aid radio structure and is converted into the audio digital signal, so that frequency change can be rapidly carried out, and the howling suppression rate is improved.
Specifically, S3 includes: s301, changing the frequency of an input audio digital signal, so that a positive feedback loop of a howling point is eliminated, and howling inhibition is realized;
s302, outputting the audio digital signal after howling inhibition through an output device, so that the audio digital signal is successfully heard by a wearer.
Through the technical scheme, the howling point positive feedback loop is eliminated, so that howling inhibition is realized, the occupied resources are very small, and the method is particularly suitable for being used on a Bluetooth digital hearing aid designed by a Bluetooth single chip.
Specifically, the S202 sound signal entering device is capable of being sampled and adjusted for different howling sound sources in corresponding changes according to the sampling rate, and the whole howling suppression range can be adjusted according to different environments and different use requirements of the wearer through the manually-settable sampling rate, so that the application range is improved.
Through the technical scheme, the digital hearing aid suppression range and the suppression effect can be improved by correspondingly adjusting different howling sound sources.
When the digital hearing aid is used, the sampling rate of a captured signal or a playing signal is changed according to the requirements of a wearer and a use environment, then the digital hearing aid is started, the howling sound source is input, the frequency is changed after the sound source is input, meanwhile, the multi-point howling frequency points are blocked, and the howling is restrained.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A method for digital hearing aid squeal suppression using a frequency conversion algorithm, characterized by: the method comprises the following steps: s1, changing the sampling rate of a captured signal or a playing signal;
s2, starting the digital hearing aid, and inputting a howling sound source;
s3, after the sound source is input, the frequency is changed, meanwhile, the multi-point howling frequency points are blocked, and howling is restrained.
2. A method for digital hearing aid howling suppression according to claim 1, characterized in that: s1 comprises the following steps: s101, inputting a sampling rate of a captured signal or a playing signal according to a use requirement;
s102, performing rising tone or falling tone according to different sampling rates of the captured signal and the playing signal.
3. A method for digital hearing aid howling suppression according to claim 1, characterized in that: s2 comprises the following steps: s201, inputting a howling sound source into an internal device through a radio structure of the digital hearing aid;
s202, the sound signal enters the device to be sampled and correspondingly changed according to the sampling rate.
4. A method for digital hearing aid howling suppression according to claim 1, characterized in that: s3 comprises the following steps: s301, changing the frequency of an input audio digital signal, so that a positive feedback loop of a howling point is eliminated, and howling inhibition is realized;
s302, outputting the audio digital signal after howling inhibition through an output device, so that the audio digital signal is successfully heard by a wearer.
5. A method for digital hearing aid howling suppression according to claim 3, characterized in that: the S202 sound signal enters the device for sampling and can be adjusted for different howling sound sources in corresponding changes according to the sampling rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310979365.2A CN116887158A (en) | 2023-08-05 | 2023-08-05 | Method for suppressing howling of digital hearing aid by frequency conversion algorithm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310979365.2A CN116887158A (en) | 2023-08-05 | 2023-08-05 | Method for suppressing howling of digital hearing aid by frequency conversion algorithm |
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| Publication Number | Publication Date |
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| CN116887158A true CN116887158A (en) | 2023-10-13 |
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| CN202310979365.2A Pending CN116887158A (en) | 2023-08-05 | 2023-08-05 | Method for suppressing howling of digital hearing aid by frequency conversion algorithm |
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2023
- 2023-08-05 CN CN202310979365.2A patent/CN116887158A/en active Pending
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