CN113645532B - Adaptive processing method of earphone with ANC and earphone with ANC - Google Patents
Adaptive processing method of earphone with ANC and earphone with ANC Download PDFInfo
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- CN113645532B CN113645532B CN202110942646.1A CN202110942646A CN113645532B CN 113645532 B CN113645532 B CN 113645532B CN 202110942646 A CN202110942646 A CN 202110942646A CN 113645532 B CN113645532 B CN 113645532B
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
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Abstract
The present disclosure relates to an adaptive processing method of an ANC-equipped earphone and an ANC-equipped earphone. The adaptive processing method includes acquiring an ambient noise signal acquired by a feedforward microphone; employing a first gain configuration of the filter assembly; determining whether an environmental factor affecting the noise reduction experience of the user under the second gain configuration of the filter component exists based on the acquired environmental noise signal; in the absence of environmental factors, adopting a second gain configuration of the filter assembly or maintaining the first gain configuration of the filter assembly; in the presence of environmental factors, a third gain configuration of the filter assembly is employed. Therefore, the problems of high background noise, poor wind noise experience, easy howling and the like brought when the noise reduction effect is pursued are avoided, and the user is ensured to have good use experience in any scene.
Description
Technical Field
The disclosure relates to the technical field of headphones, and more particularly, to an adaptive processing method of a headphone with an ANC and a headphone with an ANC.
Background
For headphones with ANC functions, because the external environment is complex and changeable, the ANC parameters need to be adaptively adjusted according to the scene to pursue the extremely good user experience, the current scheme mostly selects fixed parameters, comprehensively considers various factors, and inevitably has some options, but even if the performance is lost due to compromise, the satisfactory user experience still cannot be obtained under certain conditions.
Existing ANC enabled headphones increase system gain for the purpose of pursuing higher ANC performance to achieve more noise reduction in a loud noise environment. But this entails the risk of high background noise, and in a relatively quiet environment, the user hears annoying small noise. On the other hand, the larger ANC feedforward system gain leads to poor user experience in wind noise environment, and the increased ANC feedback system gain is easier to generate howling, thereby causing poor user experience.
Disclosure of Invention
The present disclosure is provided to solve the above-mentioned problems occurring in the prior art. The adaptive processing method of the earphone with the ANC and the earphone with the ANC are needed, and the adaptive processing is carried out according to various special environmental factors of the collected environmental noise signals, so that the problems of high background noise, poor wind noise experience, easy howling and the like brought when the noise reduction effect is pursued are solved, and the user is ensured to have good use experience under the scene of any environmental factors.
According to a first aspect of the present disclosure, there is provided an adaptive processing method of an ANC-equipped earphone including a feedforward microphone and a filter component for ANC, the adaptive processing method including: acquiring an ambient noise signal acquired by the feedforward microphone; adopting a first gain configuration of the filter assembly; determining whether an environmental factor affecting a user noise reduction experience under a second gain configuration of the filter component exists based on the acquired environmental noise signal, wherein a gain of a frequency band of interest of the second gain configuration is higher than that of the first gain configuration; adopting a second gain configuration of the filter assembly or maintaining a first gain configuration of the filter assembly in the absence of the environmental factor; and in the presence of the environmental factor, employing a third gain configuration of the filter assembly, the third gain configuration having a lower gain for an associated portion of the environmental factor in the frequency band of interest than the first gain configuration.
According to a second aspect of the present disclosure, there is provided an ANC-equipped earphone comprising a feedforward microphone configured to collect an ambient noise signal; a filter component for ANC configured to employ the gain configuration determined by the processor; the processor is configured to acquire an ambient noise signal acquired by the feedforward microphone; determining whether an environmental factor affecting a user noise reduction experience under a second gain configuration of the filter component exists based on the acquired environmental noise signal, wherein a gain of a frequency band of interest of the second gain configuration is higher than that of the first gain configuration; determining that the filter component for ANC adopts a second gain configuration or maintains a first gain configuration in the absence of the environmental factor; and in the presence of the environmental factor, determining that the filter component for ANC adopts a third gain configuration having a lower gain than the first gain configuration for an associated portion of the environmental factor in the frequency band of interest.
By utilizing the adaptive processing method of the earphone with the ANC and the earphone with the ANC according to the embodiments of the present disclosure, through performing adaptive processing according to various special environmental factors of the collected environmental noise signals, the problems of high background noise, poor wind noise experience, easy howling and the like caused while pursuing the noise reduction effect can be overcome, and the user can be ensured to have good listening experience under the scenes of any environmental factors.
Drawings
In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. The accompanying drawings illustrate various embodiments by way of example in general and not by way of limitation, and together with the description and claims serve to explain the disclosed embodiments. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive of the present apparatus or method.
Fig. 1 shows a schematic diagram of an active noise reduction process for an ANC-equipped earphone according to an embodiment of the present disclosure.
Fig. 2 shows a flow diagram of an adaptive processing method of an ANC-equipped headset according to an embodiment of the present disclosure.
Fig. 3 shows a flow diagram of an adaptive processing method that exemplifies an environmental noise level as an environmental factor according to an embodiment of the present disclosure.
FIG. 4 shows a flow diagram of a wind speed detection method according to an embodiment of the present disclosure.
Fig. 5 shows a flow diagram of an adaptive processing method in which wind noise is exemplified as an environmental factor according to an embodiment of the present disclosure.
Fig. 6 shows a flow diagram of an adaptive processing method that exemplifies the energy of an ambient noise signal as an ambient factor according to an embodiment of the present disclosure.
Fig. 7 illustrates a structural schematic diagram of an earphone provided with ANC according to an embodiment of the present disclosure.
Detailed Description
In order to better understand the technical solutions of the present disclosure, the following detailed description of the present disclosure is provided with reference to the accompanying drawings and the specific embodiments. Embodiments of the present disclosure will be described in further detail below with reference to the drawings and specific embodiments, but not by way of limitation of the present disclosure. The order in which the steps are described herein by way of example should not be construed as limiting if there is no necessity for a relationship between each other, and it should be understood by those skilled in the art that the steps may be sequentially modified without disrupting the logic of each other so that the overall process is not realized.
Fig. 1 shows a schematic diagram of an active noise reduction process of an earphone 100 according to an embodiment of the present disclosure. As shown in fig. 1, in general, the earphone 100 implements an active noise reduction process through a feed-forward path and a feedback path. To more fully describe the active noise reduction process, the following description is made in connection with the feedforward filter 111, the echo filter 112, and the feedback filter 113; it should be appreciated that the individual filters may be selectively enabled as appropriate (e.g., trade-off between power consumption, time required for noise reduction, and noise reduction effects). Typically the feedforward filter 111 is enabled and the echo filter 112 and the feedback filter 113 may be selectively enabled.
In some embodiments, in the feed-forward path, the external ear microphone 101a collects ambient noise, and the ambient noise collected by the external ear microphone 101a may include an audio component that leaks into the surrounding environment when the speaker 107 of the earphone 100 plays an audio signal, in addition to the noise generated by the surrounding environment, and the portion of the audio component becomes part of the ambient noise. The collected environmental noise is transmitted to the first low-pass and downsampling filter 104a after being subjected to gain processing of the analog gain 102a and analog-to-digital conversion processing of the first analog-to-digital converter 103 a. The first low-pass and downsampling filter 104a can reduce the filter sampling rate, thereby reducing power consumption and filter order, and further reducing the area of the noise reduction chip and reducing cost. Subsequently, the environmental noise signal passing through the first low-pass and down-sampling filter 104a is filtered by the feedforward filter to perform noise reduction processing on the environmental noise collected by the out-of-ear microphone 101 a. The environment signal after the noise reduction processing is transmitted to the adder 109, and then is played by the speaker 107 after the digital-to-analog conversion processing by the digital-to-analog converter 106. The feedforward filtered ambient noise emitted by the speaker 107 and the ambient noise arriving in the ear create an air cancellation to achieve noise reduction.
In some embodiments, in-ear microphone 101b collects in-ear noise on the inside of the earpiece near the ear canal, including audio echo signals generated when the audio signal is played and in-ear residual signals after the air cancellation, in the feedback path. The acquired in-ear noise is transmitted to the second low-pass and down-sampling filter 104b after the gain processing of the analog gain 102b and the analog-to-digital conversion processing of the second analog-to-digital converter 103 b. The second low pass and downsampling filter 104b can reduce the filter sampling rate, thereby reducing power consumption and filter order, and further reducing the area of the noise reduction chip and reducing cost. The in-ear noise signal that has passed through the second low-pass and downsampling filter 104b is then transmitted to the adder 110. The audio signal 105 to be broadcast is an audio signal to be transmitted to the speaker 107 for broadcasting, and on the one hand, it is transmitted to the adder 109, and after digital-to-analog conversion processing by the digital-to-analog converter 106, it is broadcasted by the speaker 107; on the other hand, it is transmitted to an echo filter 112, the echo filter 112 is used to cancel an audio echo signal generated after the audio signal 105 to be broadcast is played through the speaker 107, and then the audio signal 105 to be broadcast filtered by the echo filter 112 is sent to an adder 110. Adder 110 integrates the in-ear noise processed by second low pass and down-sampling filter 104b and the audio signal processed by echo filter 112 such that the noise signal on the feedback path is no longer affected by the audio echo signal. Adder 110 then transmits the integrated noise signal to feedback filter 113 for filtering to achieve feedback noise reduction. The noise signal after feedback filtering is transmitted to the adder 109 after passing through the limiter 108, and is played by the speaker 107 after being subjected to digital-to-analog conversion processing by the digital-to-analog converter 106.
Fig. 2 shows a flowchart of an adaptive processing method of an ANC-equipped earphone according to an embodiment of the present disclosure, and as shown in fig. 2, the adaptive processing method starts with step S101, and an environmental noise signal acquired by a feedforward microphone is acquired.
Step S102, a first gain configuration of the filter assembly is employed. In particular, the first gain configuration of the filter assembly herein may be a filter gain that an ANC-equipped earphone is configured to provide in pursuit of noise reduction performance.
Step S103, determining whether an environmental factor affecting the noise reduction experience of the user under a second gain configuration of the filter component exists based on the acquired environmental noise signal, wherein the gain of the frequency band of interest of the second gain configuration is higher than that of the first gain configuration. In particular, the second gain configuration of the filter component may be obtained by adding the gain of the frequency band of interest to the user based on the first gain configuration, and preferably, the filter of the second gain configuration in the present disclosure may be a filter with high noise reduction performance. The environmental factors may include an environmental noise level, wind noise, energy of an environmental noise signal, etc., and the disclosure will be described in the following embodiments with examples of the environmental noise level, wind noise, energy of an environmental noise signal as environmental factors, respectively, and are not repeated herein. In the absence of an environmental factor, either the second gain configuration of the filter assembly or the first gain configuration of the filter assembly is employed (step S104), and in the presence of an environmental factor, the third gain configuration of the filter assembly is employed (step S105), the gain of the associated portion of the environmental factor in the frequency band of interest of the third gain configuration being lower than the first gain configuration. The filter of the third gain configuration may be different based on environmental factors, e.g., when the environmental factors are environmental noise levels, the filter of the third gain configuration may be a low-floor noise filter; when the environmental factor is wind noise, the filter of the third gain configuration may be a wind noise filter; the filter of the third gain configuration may be a howling suppression filter when the environmental factor is energy of the environmental noise signal, but the present disclosure is not limited thereto.
According to the self-adaptive processing method of the earphone with the ANC, the self-adaptive processing is carried out according to various environmental factors in the collected environmental noise signals, so that the problems of high background noise, poor wind noise experience, easy howling and the like brought when the noise reduction effect is pursued are solved, and the user is guaranteed to have good listening experience under the scene of any environmental factor.
The ANC-equipped headphones used by the user should have good noise reduction performance, whether in a quiet or noisy environment, so that the user has a good listening experience. Existing ANC headphones attempt to increase the gain of the filter system in an effort to pursue high noise reduction performance, such that the user hears annoying small noise in a relatively quiet environment. Therefore, the noise reduction method and the noise reduction device realize the problem of high noise floor in a quiet environment while pursuing the noise reduction effect by monitoring the environmental noise level.
In some embodiments, the environmental factors include an environmental noise level and the associated portion of the environmental factors in the frequency band of interest includes a corresponding frequency band of background noise in the frequency band of interest. Determining whether an environmental factor affecting the user's noise reduction experience in the presence of the second gain configuration of the filter assembly based on the acquired environmental noise signal specifically includes determining whether the environmental noise level is within a first level range, employing a third gain configuration of the filter assembly if the environmental noise level is within the first level range, and employing the second gain configuration of the filter assembly or maintaining the first gain configuration of the filter assembly if the environmental noise level is not within the first level range.
Fig. 3 shows a flow diagram of an adaptive processing method that exemplifies an environmental noise level as an environmental factor according to an embodiment of the present disclosure. As shown in fig. 3, the flow starts with step S201, where an ambient noise signal is monitored. Next, it is determined whether the ambient noise level is below a second threshold (step S202), and in the case that the ambient noise level is not below the second threshold, a second gain configuration of the filter assembly is employed, i.e. a high noise reduction performance filter is used. Finally, it is determined whether the ambient noise level is lower than the first threshold, step S203), where the ambient noise level is lower than the first threshold, and it is determined that the quiet level of the environment is within the first level range, and a low-noise filter is used at this time, and where the ambient noise level is not lower than the first threshold but lower than the second threshold, the first gain configuration of the filter assembly, that is, the original filter, is maintained. For the low-noise filter, the noise floor change before and after the low-noise filter switch in a quiet environment can be measured, so that whether the noise floor is too much caused by the feedforward part or the feedback part can be found out, and a corresponding strategy is adopted, such as reducing the gain of the corresponding part to reduce the noise floor, so that the noise reduction performance of the earphone is further improved. Note that the threshold values in the present disclosure may be measured by experiments in advance.
The feedforward microphone is used for monitoring the environmental noise, and then the environmental noise level is compared with the set double threshold value, so that the environmental noise level can adopt filters with different gain configurations within different threshold value ranges, frequent switching between two modes of a low-noise filter and a high-performance noise reduction filter caused by noise fluctuation is avoided, noise reduction performance is improved, meanwhile, low-noise in a quiet environment similar to a library is considered, and listening experience of a user is improved.
In some embodiments, the environmental factors further include wind noise, and the associated portion of the environmental factors in the frequency band of interest includes a corresponding frequency band of wind noise in the frequency band of interest. Based on the acquired ambient noise signal, determining whether an ambient factor affecting the user's noise reduction experience in the presence of the second gain configuration of the filter assembly specifically includes determining whether a wind speed level obtained based on wind noise is within a second level range, employing a third gain configuration of the filter assembly if the wind speed level is within the second level range, and employing the second gain configuration of the filter assembly or maintaining the first gain configuration of the filter assembly if the wind speed level is not within the second level range.
FIG. 4 shows a flow diagram of a wind speed detection method according to an embodiment of the present disclosure. As shown in fig. 4, at least two external microphones in the earphone with ANC may be used to monitor wind noise, and after FFT transformation is performed on the monitored wind noise, the result of the cross correlation between the two low frequency bands is taken to obtain the wind speed level. Fig. 5 shows a flow diagram of an adaptive processing method in which wind noise is exemplified as an environmental factor according to an embodiment of the present disclosure. As shown in fig. 5, the flow starts with step S301, where wind noise is monitored. Next, it is determined whether the wind speed level is higher than the fourth threshold value (step S302), and in the case that the wind speed level is not higher than the fourth threshold value, the second gain configuration of the filter assembly is adopted, that is, a filter with high noise reduction performance is used. Finally, it is determined whether the wind speed level is above a third threshold (step S303), in which case a second gain configuration of the filter assembly is employed, i.e. a wind noise filter is used. In the event that the wind speed level is above the fourth threshold but not above the third threshold, the first gain configuration of the filter assembly is maintained. Secondly, the influence of wind noise on the listening experience of the user can be reduced by adding a high-pass filter. According to the method and the device, the wind noise is monitored, so that the influence of the wind noise on the user experience can be avoided when the noise reduction effect is pursued, and the listening experience of the user is improved when the noise reduction performance is improved.
In some embodiments, the environmental factors further comprise energy of the environmental noise signal, and the associated portion of the environmental factors in the frequency band of interest comprises a corresponding frequency band of the energy of the environmental noise signal in the frequency band of interest. Based on the obtained ambient noise signal, determining whether an ambient factor affecting the user's noise reduction experience in the presence of the second gain configuration of the filter component specifically includes determining whether the energy of the ambient noise signal is within a third level range, employing the third gain configuration of the filter component if the energy of the ambient noise signal is within the third level range, and employing the second gain configuration of the filter component or maintaining the first gain configuration of the filter component if the energy of the ambient noise signal is not within the third level range.
Fig. 6 shows a flow diagram of an adaptive processing method that exemplifies the energy of an ambient noise signal as an ambient factor according to an embodiment of the present disclosure. As shown in fig. 6, the flow starts with step S401, where howling is monitored. Next, the energy of the environmental noise signal is compared with a fifth threshold, and it is determined whether the energy of the environmental noise signal collected by the feedforward microphone is higher than the fifth threshold (step S402), and when the energy of the environmental noise signal collected by the feedforward microphone is not higher than the fifth threshold, a high noise reduction performance filter is used. When the energy of the environmental noise signal collected by the feedforward microphone is higher than the fifth threshold, then judging whether the frequency corresponding to the large signal in the environmental noise signal collected by the feedforward microphone is equal to the frequency corresponding to the large signal in the environmental noise signal collected by the feedback microphone (step S403), if not, adopting the second gain configuration of the filter component, namely using a filter with high noise reduction performance; if yes, a howling suppression filter is adopted, wherein the large signal represents the signal with the highest energy in the frequency domain in the collected environmental noise signals. The existing earphone with ANC usually turns off the noise reduction performance of the earphone after howling occurs, but in the environment, single-tone signals such as whistle, bell sound and the like inevitably exist, which makes the earphone with ANC inevitably detect errors. In the method, the howling suppression filter is adopted, so that negative effects caused by error detection are reduced while the pursuing of noise reduction effect is ensured, and user experience is improved.
In some embodiments, the application further discloses an earphone with ANC, as shown in fig. 7, the earphone 500 with ANC includes a feedforward microphone 501, a filter component 502 for ANC, and a processor 503, where the feedforward microphone 501 is configured to collect an environmental noise signal, the filter component 502 for ANC is configured to employ a gain configuration determined by the processor, the processor 503 is configured to obtain the environmental noise signal collected by the feedforward microphone, and based on the obtained environmental noise signal, determine whether there is an environmental factor affecting the noise reduction experience of the user in a second gain configuration of the filter component, where a gain of a focused frequency band of the second gain configuration is higher than that of the first gain configuration; determining that the filter component for the ANC adopts the second gain configuration or maintains the first gain configuration in the absence of environmental factors; and in the presence of an environmental factor, determining that the filter component for the ANC adopts a third gain configuration, the gain of the associated portion of the environmental factor in the frequency band of interest of the third gain configuration being lower than the first gain configuration. In addition, the ANC-equipped headset 500 may also include a feedback microphone 504, which may be configured to collect ambient noise signals. According to the earphone with the ANC, the self-adaptive processing is carried out according to the collected environmental noise signals, so that the problems of high background noise, poor wind noise experience, easy howling and the like brought when the noise reduction effect is pursued are overcome, and the user is guaranteed to have good listening experience in any scene.
Since the operation principle of the earphone with ANC in the present disclosure is the same as that of the adaptive processing method of the earphone with ANC in the foregoing embodiment, the operation principle of the earphone with ANC may be referred to the operation principle of the adaptive processing method of the earphone with ANC in the foregoing embodiment, which is not described herein.
Furthermore, although illustrative embodiments are described herein, the scope includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., of schemes across various embodiments), adaptations or alterations based on the present disclosure. Elements in the claims will be construed broadly based on the language used in the claims and not limited to examples described in the specification or during the lifetime of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the description be regarded as examples only, with a true scope being indicated by the following claims and their full range of equivalents.
The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. Other embodiments may be used by those of ordinary skill in the art in view of the above description. Moreover, in the foregoing detailed description, various features may be grouped together to simplify the present disclosure. This should not be interpreted as intending that an unclaimed disclosed feature is essential to any claim. Rather, the inventive subject matter may lie in less than all features of a single disclosed embodiment. Thus, the claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the application should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
Claims (11)
1. An adaptive processing method of an ANC-equipped earphone including a feedforward microphone and a filter component for ANC, the adaptive processing method comprising:
acquiring an ambient noise signal acquired by the feedforward microphone;
adopting a first gain configuration of the filter assembly;
determining, based on the acquired ambient noise signal, whether there are environmental factors affecting a user noise reduction experience in a second gain configuration of the filter assembly, wherein the environmental factors include an ambient noise level, wind noise, and energy of the ambient noise signal, before being adjusted by the first gain configuration to a second gain configuration having higher noise reduction performance;
in the presence of the environmental factor, adopting a third gain configuration, specifically including:
configuring a low-floor noise filter with the third gain configuration when the environmental factors include an environmental noise level;
configuring a wind noise filter with the third gain configuration when the environmental factor includes wind noise;
configuring a howling suppression filter with the third gain configuration when the environmental factor includes energy of an environmental noise signal;
in the absence of the environmental factor, configuring the high noise reduction performance filter with a second gain configuration or maintaining the first gain configuration of the filter assembly.
2. The adaptive processing method according to claim 1, wherein determining whether an environmental factor affecting a user noise reduction experience in the second gain configuration of the filter component is present based on the acquired environmental noise signal comprises: it is determined whether the ambient noise level is within a first level range.
3. The adaptive processing method according to claim 2, wherein determining whether the ambient noise level is within the first level range comprises:
comparing the ambient noise level with a first threshold and a second threshold higher than the first threshold;
determining that the ambient noise level is within a first level range if the ambient noise level is below a first threshold;
in the absence of the environmental factor, employing the second gain configuration of the filter assembly or maintaining the first gain configuration of the filter assembly specifically includes:
maintaining a first gain configuration of the filter component if an ambient noise level is not below the first threshold but below a second threshold;
a second gain configuration of the filter component is employed if the ambient noise level is not below the second threshold.
4. The adaptive processing method according to claim 1, wherein determining whether an environmental factor affecting a user noise reduction experience in the second gain configuration of the filter component is present based on the acquired environmental noise signal comprises: it is determined whether a wind speed level obtained based on wind noise is within a second level range.
5. The adaptive processing method according to claim 4, wherein determining whether the wind speed level obtained based on wind noise is within the second level range comprises:
comparing the wind speed level with a third threshold value and a fourth threshold value lower than the third threshold value;
determining that the wind speed level is within the second level range if the wind speed level is above the third threshold;
in the absence of the environmental factor, employing the second gain configuration of the filter assembly or maintaining the first gain configuration of the filter assembly specifically includes:
maintaining a first gain configuration of the filter assembly if the wind speed level is above a fourth threshold but not above a third threshold;
in case the wind speed level is not higher than said fourth threshold value, a second gain configuration of said filter assembly is employed.
6. The adaptive processing method according to claim 1, wherein determining whether an environmental factor affecting a user noise reduction experience in the second gain configuration of the filter component is present based on the acquired environmental noise signal comprises: it is determined whether the energy of the ambient noise signal is within a third level range.
7. The adaptive processing method according to claim 6, wherein determining whether the energy of the ambient noise signal is within a third level range comprises:
comparing the energy of the ambient noise signal with a fifth threshold;
determining that the energy of the environmental noise signal is within a third level range when the energy of the environmental noise signal is higher than a fifth threshold and the frequency corresponding to a large signal in the environmental noise signal collected by the feedforward microphone is equal to the frequency corresponding to the large signal in the environmental noise signal collected by the feedback microphone, wherein the large signal represents a signal with highest energy in the collected environmental noise signal;
in the absence of the environmental factor, employing the second gain configuration of the filter assembly or maintaining the first gain configuration of the filter assembly specifically includes:
the second gain configuration of the filter component is employed in the event that the energy of the ambient noise signal is not above the fifth threshold, or the energy of the ambient noise signal is above the fifth threshold but the frequency corresponding to the large signal in the ambient noise signal collected by the feedforward microphone is not equal to the frequency corresponding to the large signal in the ambient noise signal collected by the feedback microphone.
8. An ANC-equipped earphone, characterized in that the ANC-equipped earphone comprises:
a feedforward microphone configured to collect an ambient noise signal;
a filter component for ANC configured to employ the gain configuration determined by the processor;
the processor is configured to:
acquiring an ambient noise signal acquired by the feedforward microphone;
adopting a first gain configuration of the filter assembly;
determining, based on the acquired ambient noise signal, whether there are environmental factors affecting a user noise reduction experience in a second gain configuration of the filter assembly, wherein the environmental factors include an ambient noise level, wind noise, and energy of the ambient noise signal, before being adjusted by the first gain configuration to a second gain configuration having higher noise reduction performance;
in the presence of the environmental factor, adopting a third gain configuration, specifically including:
configuring a low-floor noise filter with the third gain configuration when the environmental factors include an environmental noise level;
configuring a wind noise filter with the third gain configuration when the environmental factor includes wind noise;
configuring a howling suppression filter with the third gain configuration when the environmental factor includes energy of an environmental noise signal;
in the absence of the environmental factor, determining that the filter component for ANC configures the high noise reduction performance filter with a second gain configuration or maintains the first gain configuration.
9. The ANC-equipped headset of claim 8, wherein the processor is further configured to: determining whether the ambient noise level is within a first level range, determining that the filter component for ANC adopts a third gain configuration within the first level range, and not determining that the filter component for ANC adopts a second gain configuration or maintains the first gain configuration within the first level range.
10. The ANC-equipped headset of claim 8, wherein the processor is further configured to: determining whether a wind speed level obtained based on wind noise is within a second level range; determining that the filter component for ANC adopts the third gain configuration in the second horizontal range, and not determining that the filter component for ANC adopts the second gain configuration or maintains the first gain configuration in the second horizontal range.
11. The ANC-equipped headset of claim 8, wherein the processor is further configured to: determining whether the energy of the ambient noise signal is within a third level range; determining that the filter component for ANC adopts a third gain configuration in a third horizontal range, and not determining that the filter component for ANC adopts a second gain configuration in the third horizontal range.
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| CN116156385B (en) * | 2023-04-19 | 2023-07-07 | 深圳市汇顶科技股份有限公司 | Filtering method, filtering device, chip and earphone |
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