CN113660594A - Self-adjusting noise reduction method and device for hearing aid system - Google Patents
Self-adjusting noise reduction method and device for hearing aid system Download PDFInfo
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Abstract
The invention provides a self-adjusting noise reduction method of a hearing aid system, which comprises the following steps: generating an input signal from a sound signal of an ambient environment; modifying the input signal to produce an output signal therefrom, the modifying including removing or reducing the amplitude of a particular range of frequencies of the input signal; storing the output signal information in a certain time domain, wherein the output signal information comprises amplitude and vibration frequency information; the change value of the output signal information of the front time domain and the rear time domain is obtained, the correction content of the input signal is changed according to the change value, the sound environment in the front time domain and the rear time domain is monitored and can be used as a basis for judging the change of the noise environment, and the overlapping part of basic time units exists between adjacent time domain setting information, so that the relevance of the front time domain data and the rear time domain data is enhanced, and the method is more objective and accurate; and calculating the standard deviation of the amplitude information of the output signal in a certain time domain, and mastering the dispersity of the amplitude information.
Description
Technical Field
The invention relates to the field of hearing aids, in particular to a self-adjusting noise reduction method and a self-adjusting noise reduction device for a hearing aid system.
Background
The basic structure of the hearing aid comprises four main parts, namely a microphone, an amplifier, an earphone and a power supply, wherein the hearing aid converts a sound signal into an electric signal (electric energy) and sends the electric signal to the amplifier, the amplifier amplifies the weak input electric signal and then transmits the electric signal to an output transducer, the output transducer is composed of an earphone or a bone vibrator and has the function of converting the amplified strong signal into an acoustic signal (acoustic energy) or kinetic energy for output, and therefore, the signal transmitted by the earphone or the bone vibrator is stronger than the signal originally received by the microphone, and the hearing loss of a person with hearing disorder can be compensated to different degrees;
the hearing impairment is one of the main problems affecting the quality of life of human beings and causing disability, and is the general term of hearing impairment of different degrees caused by auditory conduction pathway generators qualitative or functional lesions, deafness with lower degree is sometimes called as heavy hearing, hearing impairment obviously affecting normal social ability is called as deafness, because the binaural hearing impairment can not be used for normal socializing people with language and is called as deaf-mute or deaf people, most congenital hearing impairment patients have different hearing mechanisms from normal people, and in a noise environment, the hearing aids lack biological regulation capability to sound and lack corresponding feedback mechanisms, so that the hearing impairment patients can not adapt to the noise environment, are not good for communication, can cause secondary damage to hearing and seriously bother work and life of the hearing impairment patients.
SUMMARY OF THE PATENT FOR INVENTION
Aiming at the defects in the prior art, the invention provides a self-adjusting noise reduction method and a self-adjusting noise reduction device for a hearing aid system, so as to improve the adaptability of hearing-impaired patients to noise environments.
According to a first aspect of the embodiments of the present disclosure, a preferred embodiment of the present invention provides a self-adjusting noise reduction method for a hearing aid system, including:
generating an input signal from a sound signal of an ambient environment;
modifying the input signal to produce an output signal therefrom, the modifying including removing or reducing the amplitude of a particular range of frequencies of the input signal;
storing the output signal information in a certain time domain, wherein the output signal information comprises amplitude and vibration frequency information;
and obtaining the change value of the output signal information of the front time domain and the rear time domain, and changing the correction content of the input signal according to the change value.
In one embodiment, the storing the output signal information in a timing domain, the output signal information including amplitude and frequency information, includes:
acquiring time domain setting information and basic time unit information of the output signal, wherein the time domain setting information comprises a constant number of basic time units;
and storing the output signal information in different time domains according to the time domain setting information and the basic time unit information.
In an embodiment, the obtaining a variation value of the output signal information in the time domain before and after and changing the content of the modification to the input signal according to the magnitude of the variation value includes:
calculating a standard deviation of amplitude information of the output signal in a certain time domain;
obtaining the change value of the standard deviation of the time domains before and after, wherein the change value comprises difference absolute value information and positive and negative value information;
judging increase and decrease information of the correction content according to the positive and negative value information;
calculating the multiple relation between the difference absolute value information and a standard value;
and generating correction content execution information according with the increase and decrease information according to the multiple relation between the difference absolute value information and the standard value.
In an embodiment, the generating of the modified content execution information according to the multiple relationship between the absolute difference value information and the standard value includes:
calculating the multiple relation between the average values of the amplitude information of the output signals of the front time domain and the rear time domain;
and determining the times of removing or reducing the amplitude of the specific range frequency of the input signal according to the multiple relation between the average values of the amplitude information of the output signals and the increase and decrease information.
According to a second aspect of the disclosed embodiments, the present invention provides a self-adjusting noise reduction apparatus for a hearing aid system, comprising:
the system comprises an acquisition module, a processing module and a control module, wherein the acquisition module is used for generating an input signal from a sound signal of the surrounding environment;
a filtering module for modifying the input signal and generating an output signal therefrom, the modification including removing or reducing the amplitude of a particular range of frequencies of the input signal;
the statistical module is used for storing the output signal information in a certain time domain, wherein the output signal information comprises amplitude and vibration frequency information;
and the adjusting module is used for obtaining the change value of the output signal information of the front time domain and the rear time domain and changing the correction content of the input signal according to the change value.
In one embodiment, the statistics module includes:
an obtaining module, configured to obtain time domain setting information and basic time unit information of the output signal, where the time domain setting information includes a constant number of basic time units;
and the cache module is used for storing the output signal information in different time domains according to the time domain setting information and the basic time unit information.
In one embodiment, the adjustment module includes:
the first calculation module is used for calculating the standard deviation of the amplitude information of the output signal in a certain time domain;
the second calculation module is used for solving a change value of the standard deviation of the time domains before and after, wherein the change value comprises difference absolute value information and positive and negative value information;
the judging module is used for judging the increase and decrease information of the corrected content according to the positive and negative value information;
the third calculation module is used for calculating the multiple relation between the difference absolute value information and a standard value;
and the generating module is used for generating the corrected content execution information according with the increase and decrease information according to the multiple relation between the difference absolute value information and the standard value.
In one embodiment, the generating module includes:
the calculating submodule is used for calculating the multiple relation between the average values of the amplitude information of the output signals of the front time domain and the rear time domain;
and the determining module is used for determining the times of removing or reducing the amplitude of the specific range frequency of the input signal according to the multiple relation between the average values of the amplitude information of the output signals and the increase and decrease information.
According to a third aspect of the embodiments of the present disclosure, the present invention provides a self-adjusting noise reduction apparatus for a hearing aid system, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
generating an input signal from a sound signal of an ambient environment;
modifying the input signal to produce an output signal therefrom, the modifying including removing or reducing the amplitude of a particular range of frequencies of the input signal;
storing the output signal information in a certain time domain, wherein the output signal information comprises amplitude and vibration frequency information;
and obtaining the change value of the output signal information of the front time domain and the rear time domain, and changing the correction content of the input signal according to the change value.
According to the technical scheme, the self-adjusting noise reduction method and the self-adjusting noise reduction device for the hearing aid system have the following beneficial effects: the sound environment in the front time domain and the rear time domain is monitored and can be used as a basis for judging the change of the noise environment, and the overlapping part of basic time units exists between the adjacent time domain setting information, so that the relevance of the front time domain data and the rear time domain data is enhanced, and the objective and accurate effects are achieved; the standard deviation of the amplitude information of the output signals in a certain time domain is calculated, the dispersity of the amplitude information can be mastered, the dispersity of the amplitude information of the output signals in the front time domain and the dispersity of the amplitude information of the output signals in the rear time domain are compared, and correction content execution information about the change of the sound environment can be obtained.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
In order to more clearly illustrate the patentable embodiments of the invention, reference will now be made to the appended drawings, which are briefly described as embodiments or as required in the prior art description. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
FIG. 1 is a flow chart of a self-adjusting noise reduction method for a hearing aid system according to the present invention;
fig. 2 is a flowchart of step S103 in a self-adjusting noise reduction method of a hearing aid system according to the present invention;
fig. 3 is a flowchart of step S104 in a self-adjusting noise reduction method of a hearing aid system according to the present invention;
fig. 4 is a flowchart of step S305 in a self-adjusting noise reduction method of a hearing aid system according to the present invention;
FIG. 5 is a block diagram of a self-adjusting noise reduction device of a hearing aid system according to the present invention;
FIG. 6 is a block diagram of a statistical module in a self-adjusting noise reduction device of a hearing aid system according to the present invention;
FIG. 7 is a block diagram of an adjustment module of the self-adjusting noise reduction device of the hearing aid system according to the present invention;
FIG. 8 is a block diagram of a generation module in a self-adjusting noise reduction apparatus of a hearing aid system according to the present invention;
fig. 9 is a block diagram of another self-adjusting noise reduction device of a hearing aid system according to the present invention.
Detailed Description
Embodiments of the patented technology of the present invention will be described in detail below with reference to the drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only used as examples, and the protection scope of the present invention is not limited thereby.
Fig. 1 is a flowchart of a self-adjusting noise reduction method for a hearing aid system, which is applied to a hearing aid device. As shown in fig. 1, the self-adjustment noise reduction method for a hearing aid system according to the present embodiment includes the following steps S101 to S104:
in step S101, an input signal is generated from a sound signal of the surrounding environment;
in step S102, modifying the input signal and generating an output signal therefrom, wherein the modifying includes removing or reducing the amplitude of a specific range of frequencies of the input signal;
the method comprises the steps that an acoustoelectric conversion device such as a microphone and a microphone collects air vibration in the surrounding environment of the hearing aid terminal, the vibration is converted into electric signal fluctuation to serve as an audio input signal, and then the electric signal fluctuation is eliminated or weakened through an audio processing device such as a filter and the like aiming at noise audio frequency of a specific range of frequency, so that noise interference can be reduced, wherein the amplitude of the specific range of frequency of the input signal can be eliminated or reduced by adopting an active noise reduction technology, and the aim of reducing noise can be achieved by simulating reverse sound waves of generated noise through vibration.
In step S103, saving the output signal information in a certain time domain, where the output signal information includes amplitude and oscillation frequency information;
the selection of the time domain is between 5 and 15 seconds, so that the advantage that the short time domain causes frequent replacement of the active adjusting mechanism, which causes continuous change of the hearing ability of the hearing-impaired patient along with the sound, and is not beneficial to reaction and communication, while the long time domain causes slow adjustment of the active adjusting mechanism, which causes the hearing ability of the hearing-impaired patient not to be rapidly integrated into a noise environment, and the hearing-impaired patient has a long inadaptation period;
the output signal information can generate a sound wave pattern according to the amplitude and vibration frequency information so as to realize the function of monitoring the sound environment within 5-15 s.
In step S104, a variation value of the output signal information in the front and rear time domains is obtained, and the content of the input signal modification is changed according to the magnitude of the variation value;
through the monitoring to closing on time point sound environment, can calculate the change numerical value of noise environment, if the noise increase, then increase the correction content to input signal to the influence of weakening noise, if the noise reduces, then corresponding weakening to the correction content of input signal, can not influence the reaction of hearing impaired patient to the noise sound source, compensatied the loss of hearing impaired patient hearing mechanism.
As shown in fig. 2, in step S103, the storing the output signal information in a certain time domain, where the output signal information includes amplitude and frequency information, includes the following steps S201 to S202:
in step S201, obtaining time domain setting information and basic time unit information of the output signal, where the time domain setting information includes a constant number of basic time units;
in step S202, storing information of output signals in different time domains according to the time domain setting information and the basic time unit information;
the time domain setting information is composed of at least one basic time unit, an overlapping part of the basic time unit exists between adjacent time domain setting information, and the arrangement of the overlapping part enhances the relevance of front and rear time domain data, and is more objective and accurate compared with a completely time-divided statistical mode;
for example, the following steps are carried out: the time domain setting information is 8s, the basic time unit information is 0.5s, so that the time domain setting information is divided into 16 parts, the former time domain is between 0 and 8s, the latter time domain is between 7.5s and 15.5s, and the like;
optionally, the previous time domain is between 0s and 8s, and the subsequent time domain may also be 6s to 14s, 12s to 20s, 18s to 26s, and 24s to 32 s.
In one embodiment, as shown in fig. 3, in step S104, the obtaining a variation value of the output signal information in the time domain before and after the time domain, and changing the content of the modification to the input signal according to the magnitude of the variation value includes the following steps S301 to S305:
in step S301, calculating a standard deviation of amplitude information of the output signal in a certain time domain;
the amplitude information is the peak amplitude intensity of the audio signal, and the standard deviation can be used to describe the dispersion of the amplitude information, and the formula is:
in step S302, a variation value of the standard deviation in the previous and subsequent time domains is obtained, where the variation value includes absolute value information of a difference value and positive and negative value information;
in step S303, increase/decrease information of the correction content is determined based on the positive/negative value information;
for example, the following steps are carried out: and recording the first standard deviation value as a, recording the second standard deviation value as b, and then taking | b-a | or | a-b | as difference absolute value information, wherein the difference absolute value information can reflect the change of the amplitude information, the dispersion of the amplitude information is reduced if a-b is a positive value, and the dispersion of the amplitude information is improved if a-b is a negative value.
In step S304, calculating a multiple relationship between the difference absolute value information and a standard value;
in step S305, generating correction content execution information corresponding to the increase/decrease information based on a multiple relationship between the difference absolute value information and a standard value;
preferably, the multiple relation between the absolute difference value information and the standard value is associated with correction content execution information of different degrees in a pairing manner, so that the correction content execution information can be changed greatly under the condition that the hearing environment is changed greatly, and the correction content execution information can be changed slightly under the condition that the hearing environment is not changed greatly, so that the hearing threshold range of the hearing-impaired patient can be changed, and the adaptability to the noise environment can be enhanced, wherein the relation between the multiple relation between the absolute difference value information and the standard value and the correction content execution information is recorded as d1 D2/d3/d4/d 5.
In one embodiment, as shown in fig. 4, in step S305, the generating of the modified content execution information according to the increase/decrease information according to the multiple relationship between the absolute value information of the difference and the standard value includes the following steps S401 to S402:
in step S401, a multiple relation between average values of the output signal amplitude information in the previous and next time domains is calculated;
in step S402, determining a multiple of the amplitude of the input signal in the specific range frequency according to the multiple relationship between the average values of the amplitude information of the output signal and the increase/decrease information;
the average values of the amplitude information of the time domain output signals before and after recording are respectively n1 and n2, then n2/n1 can obtain the multiple relation of the two, the product of n2/n1 and the value d is the multiple of removing or reducing the amplitude of the specific range frequency of the input signal for the correction content, and the noise audio of the specific range frequency is eliminated or weakened by changing, adding a filter and other audio processing devices;
for example, the following steps are carried out: the hearing-impaired patient is seated in the vehicle, when the vehicle starts to run, the hearing noise is higher, and then the noise becomes lower, because the receiving hearing threshold of the hearing aid is raised due to the long-term environment with the noise, the hearing-impaired patient can be helped to adapt to the noise environment quickly.
The following are embodiments of the disclosed apparatus that may be used to perform embodiments of the disclosed methods.
Fig. 5 is a block diagram of a self-adjusting noise reduction device of a hearing aid system, which can be implemented as part or all of a hearing aid device by software, hardware or a combination of both. As shown in fig. 5, the apparatus includes:
the system comprises an acquisition module 1, a processing module and a control module, wherein the acquisition module is used for generating an input signal from a sound signal of the surrounding environment;
a filtering module 2, configured to modify the input signal and generate an output signal therefrom, where the modification includes removing or reducing the amplitude of a specific range of frequencies of the input signal;
the statistical module 3 is configured to store the output signal information in a certain time domain, where the output signal information includes amplitude and oscillation frequency information;
and the adjusting module 4 is used for solving the change value of the output signal information of the front time domain and the rear time domain, and changing the correction content of the input signal according to the change value.
According to the device disclosed by the embodiment of the disclosure, the sound environments in the front time domain and the rear time domain are monitored and can be used as a basis for judging the change of the noise environment, and the overlapping part of basic time units exists between adjacent time domain setting information, so that the relevance of the front time domain data and the rear time domain data is enhanced, and the device is more objective and accurate; the standard deviation of the amplitude information of the output signals in a certain time domain is calculated, the dispersity of the amplitude information can be mastered, the dispersity of the amplitude information of the output signals in the front time domain and the dispersity of the amplitude information of the output signals in the rear time domain are compared, and correction content execution information about the change of the sound environment can be obtained.
In an embodiment, as shown in fig. 6, the statistical module 3 includes:
an obtaining module 31, configured to obtain time domain setting information and basic time unit information of the output signal, where the time domain setting information includes a constant number of basic time units;
and the buffer module 32 is configured to store the output signal information in different time domains according to the time domain setting information and the basic time unit information.
In one embodiment, as shown in fig. 7, the adjusting module 4 includes:
a determining module 41, configured to apply a first calculating module, configured to calculate a standard deviation of amplitude information of the output signal in a certain time domain;
a second calculating module 42, configured to calculate a variation value of the standard deviation of the previous and next time domains, where the variation value includes difference absolute value information and positive and negative value information;
a judging module 43, configured to judge increase/decrease information of the corrected content according to the positive/negative value information;
a third calculating module 44, configured to calculate a multiple relationship between the absolute difference information and a standard value;
and a generating module 45, configured to generate, according to the multiple relationship between the absolute difference information and the standard value, corrected content execution information that conforms to the increase/decrease information.
In one embodiment, as shown in fig. 8, the generating module 45 includes:
the calculating submodule 451 is used for calculating the multiple relation between the average values of the amplitude information of the output signals of the front time domain and the rear time domain;
the determining module 452 is configured to determine, according to the multiple relationship between the average values of the amplitude information of the output signals and the increase/decrease information, the multiple of the amplitude of the specific range of frequency of the input signal that is removed or reduced by the modification content.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
The embodiment of the present disclosure further provides a self-adjusting noise reduction device for a hearing aid system, as shown in fig. 9, including:
a processor 101;
a memory 102 for storing instructions executable by the processor 101;
wherein the processor 101 is configured to:
generating an input signal from a sound signal of an ambient environment;
modifying the input signal to produce an output signal therefrom, the modifying including removing or reducing the amplitude of a particular range of frequencies of the input signal;
storing the output signal information in a certain time domain, wherein the output signal information comprises amplitude and vibration frequency information;
and obtaining the change value of the output signal information of the front time domain and the rear time domain, and changing the correction content of the input signal according to the change value.
The processor 101 may be further configured to:
the storing of the output signal information in a certain time domain, where the output signal information includes amplitude and frequency information, includes:
acquiring time domain setting information and basic time unit information of the output signal, wherein the time domain setting information comprises a constant number of basic time units;
and storing the output signal information in different time domains according to the time domain setting information and the basic time unit information.
The processor 101 may be further configured to:
the obtaining of the change value of the output signal information of the time domains before and after and the change of the correction content of the input signal according to the change value comprises:
calculating a standard deviation of amplitude information of the output signal in a certain time domain;
obtaining the change value of the standard deviation of the time domains before and after, wherein the change value comprises difference absolute value information and positive and negative value information;
judging increase and decrease information of the correction content according to the positive and negative value information;
calculating the multiple relation between the difference absolute value information and a standard value;
and generating correction content execution information according with the increase and decrease information according to the multiple relation between the difference absolute value information and the standard value.
The processor 101 may be further configured to:
the generating of the correction content execution information according with the increase and decrease information according to the multiple relation between the difference absolute value information and the standard value includes:
calculating the multiple relation between the average values of the amplitude information of the output signals of the front time domain and the rear time domain;
and determining the times of removing or reducing the amplitude of the specific range frequency of the input signal according to the multiple relation between the average values of the amplitude information of the output signals and the increase and decrease information.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 9 is a block diagram of another self-adjusting noise reduction device for a hearing aid system, which is suitable for a hearing aid device.
The hearing assistance device may include one or more of the following components: processing component 100, memory 102, communication component 110, input/output interface 120, power component 130, multimedia component 140, sensor component 150, and audio component 160. The processing component 100 generally controls the overall operation of the hearing assistance device, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing assembly 100 may include one or more processors 101 to execute instructions to perform all or part of the steps of the method described above. Further, the processing component 100 can include one or more modules that facilitate interaction between the processing component 100 and other components. For example, the processing component 100 may include a multimedia module to facilitate interaction between the multimedia component 140 and the processing component 100.
The memory 102 is configured to store various types of data to support operation at the hearing assistance device. Examples of such data include instructions for any application or method operating on the hearing assistance device, contact data, phone book data, messages, pictures, videos, and so forth. The memory 102 may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. The power supply assembly 130 provides power to the various components of the hearing assistance device. The power supply components 130 can include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for hearing assistance devices.
The multimedia component 140 includes a screen that provides an output interface between the hearing assistance device and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 140 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera can receive external multimedia data when the hearing aid device is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability. The audio component 160 is configured to output and/or input audio signals. For example, the audio component 160 can include a Microphone (MIC) configured to receive an external audio signal when the hearing assistance device is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 102 or transmitted via the communication component 110. In some embodiments, the audio assembly 160 further includes a speaker for outputting audio signals. The input/output interface 120 provides an interface between the processing component 100 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button. The sensor assembly 150 includes one or more sensors for providing various aspects of state assessment for the hearing assistance device. For example, the sensor assembly 150 can detect the on/off state of the hearing aid device, the relative positioning of the components, such as the display and keypad of the hearing aid device, the sensor assembly 150 can also detect a change in the position of the hearing aid device or a component of the hearing aid device, the presence or absence of user contact with the hearing aid device, the orientation or acceleration/deceleration of the hearing aid device, and a change in the temperature of the hearing aid device. The sensor assembly 150 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 150 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 150 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 110 is configured to facilitate wired or wireless communication between the hearing assistance device and other devices. The hearing assistance device can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication part 110 receives a broadcast signal or broadcast associated information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 110 further includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the hearing assistance device can be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 102 comprising instructions, executable by the processor 101 of the hearing assistance device to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
A non-transitory computer readable storage medium having instructions therein which, when executed by a processor 101 of a hearing assistance device, enable the hearing assistance device to improve an ability of a hearing impaired patient to adapt to a noise environment, the method comprising:
generating an input signal from a sound signal of an ambient environment;
modifying the input signal to produce an output signal therefrom, the modifying including removing or reducing the amplitude of a particular range of frequencies of the input signal;
storing the output signal information in a certain time domain, wherein the output signal information comprises amplitude and vibration frequency information;
and obtaining the change value of the output signal information of the front time domain and the rear time domain, and changing the correction content of the input signal according to the change value.
In one embodiment, the storing the output signal information in a timing domain, the output signal information including amplitude and frequency information, includes:
acquiring time domain setting information and basic time unit information of the output signal, wherein the time domain setting information comprises a constant number of basic time units;
and storing the output signal information in different time domains according to the time domain setting information and the basic time unit information.
In an embodiment, the obtaining a variation value of the output signal information in the time domain before and after and changing the content of the modification to the input signal according to the magnitude of the variation value includes:
calculating a standard deviation of amplitude information of the output signal in a certain time domain;
obtaining the change value of the standard deviation of the time domains before and after, wherein the change value comprises difference absolute value information and positive and negative value information;
judging increase and decrease information of the correction content according to the positive and negative value information;
calculating the multiple relation between the difference absolute value information and a standard value;
and generating correction content execution information according with the increase and decrease information according to the multiple relation between the difference absolute value information and the standard value.
In an embodiment, the generating of the modified content execution information according to the multiple relationship between the absolute difference value information and the standard value includes:
calculating the multiple relation between the average values of the amplitude information of the output signals of the front time domain and the rear time domain;
and determining the times of removing or reducing the amplitude of the specific range frequency of the input signal according to the multiple relation between the average values of the amplitude information of the output signals and the increase and decrease information.
In the description of the present patent application, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present patent. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above examples are only used to illustrate the technical solutions of the present invention, but not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or substitutions do not make the essence of the corresponding technical solution depart from the scope of the technical solutions of the embodiments of the patent of the present invention, and the technical solutions are all covered in the claims and the specification of the patent of the present invention.
Claims (9)
1. A self-adjusting noise reduction method for a hearing aid system, comprising:
generating an input signal from a sound signal of an ambient environment;
modifying the input signal to produce an output signal therefrom, the modifying including removing or reducing the amplitude of a particular range of frequencies of the input signal;
storing the output signal information in a certain time domain, wherein the output signal information comprises amplitude and vibration frequency information;
and obtaining the change value of the output signal information of the front time domain and the rear time domain, and changing the correction content of the input signal according to the change value.
2. The method of claim 1, wherein the storing the output signal information in a certain time domain, the output signal information comprising amplitude and frequency information, comprises:
acquiring time domain setting information and basic time unit information of the output signal, wherein the time domain setting information comprises a constant number of basic time units;
and storing the output signal information in different time domains according to the time domain setting information and the basic time unit information.
3. The method according to claim 1, wherein said determining a variation value of said output signal information in a previous time domain and a next time domain, and changing a content of a modification to an input signal according to a magnitude of said variation value comprises:
calculating a standard deviation of amplitude information of the output signal in a certain time domain;
obtaining the change value of the standard deviation of the time domains before and after, wherein the change value comprises difference absolute value information and positive and negative value information;
judging increase and decrease information of the correction content according to the positive and negative value information;
calculating the multiple relation between the difference absolute value information and a standard value;
and generating correction content execution information according with the increase and decrease information according to the multiple relation between the difference absolute value information and the standard value.
4. The method according to claim 3, wherein the generating of the revision content execution information in accordance with the increase/decrease information based on the multiple relationship between the absolute value information of the difference and the standard value includes:
calculating the multiple relation between the average values of the amplitude information of the output signals of the front time domain and the rear time domain;
and determining the times of removing or reducing the amplitude of the specific range frequency of the input signal according to the multiple relation between the average values of the amplitude information of the output signals and the increase and decrease information.
5. A self-adjusting noise reduction device for a hearing assistance system, comprising:
the system comprises an acquisition module, a processing module and a control module, wherein the acquisition module is used for generating an input signal from a sound signal of the surrounding environment;
a filtering module for modifying the input signal and generating an output signal therefrom, the modification including removing or reducing the amplitude of a particular range of frequencies of the input signal;
the statistical module is used for storing the output signal information in a certain time domain, wherein the output signal information comprises amplitude and vibration frequency information;
and the adjusting module is used for obtaining the change value of the output signal information of the front time domain and the rear time domain and changing the correction content of the input signal according to the change value.
6. The apparatus of claim 5, wherein the statistics module comprises:
an obtaining module, configured to obtain time domain setting information and basic time unit information of the output signal, where the time domain setting information includes a constant number of basic time units;
and the cache module is used for storing the output signal information in different time domains according to the time domain setting information and the basic time unit information.
7. The apparatus of claim 5, wherein the adjustment module comprises:
the first calculation module is used for calculating the standard deviation of the amplitude information of the output signal in a certain time domain;
the second calculation module is used for solving a change value of the standard deviation of the time domains before and after, wherein the change value comprises difference absolute value information and positive and negative value information;
the judging module is used for judging the increase and decrease information of the corrected content according to the positive and negative value information;
the third calculation module is used for calculating the multiple relation between the difference absolute value information and a standard value;
and the generating module is used for generating the corrected content execution information according with the increase and decrease information according to the multiple relation between the difference absolute value information and the standard value.
8. The apparatus of claim 7, wherein the generating module comprises:
the calculating submodule is used for calculating the multiple relation between the average values of the amplitude information of the output signals of the front time domain and the rear time domain;
and the determining module is used for determining the times of removing or reducing the amplitude of the specific range frequency of the input signal according to the multiple relation between the average values of the amplitude information of the output signals and the increase and decrease information.
9. A self-adjusting noise reduction device for a hearing assistance system, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
generating an input signal from a sound signal of an ambient environment;
modifying the input signal to produce an output signal therefrom, the modifying including removing or reducing the amplitude of a particular range of frequencies of the input signal;
storing the output signal information in a certain time domain, wherein the output signal information comprises amplitude and vibration frequency information;
and obtaining the change value of the output signal information of the front time domain and the rear time domain, and changing the correction content of the input signal according to the change value.
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