CN213186477U - Bluetooth headset noise reduction system - Google Patents
Bluetooth headset noise reduction system Download PDFInfo
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- CN213186477U CN213186477U CN202022038051.7U CN202022038051U CN213186477U CN 213186477 U CN213186477 U CN 213186477U CN 202022038051 U CN202022038051 U CN 202022038051U CN 213186477 U CN213186477 U CN 213186477U
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Abstract
The application discloses bluetooth headset noise reduction system includes: the Bluetooth headset comprises a headset shell, a headset loudspeaker, a headset reference microphone, a headset contact and a headset processor, wherein the headset loudspeaker, the headset reference microphone, the headset contact and the headset processor are arranged in the headset shell; the earphone reference microphone is used for collecting environmental noise and transmitting the environmental noise to the earphone processor; the earphone processor is used for carrying out sound anti-phase processing; the earphone loudspeaker plays the reversed audio signal after the reversed phase processing; the error microphone is arranged outside the earphone shell, is connected with the earphone processor through the earphone contact and is used for collecting reverse audio signals played by the earphone loudspeaker and audio signals of environmental noise and transmitting the audio signals to the earphone processor. The earphone processor combines the difference signal of the error microphone and the environmental noise to adjust the noise reduction parameter, thereby effectively reducing the influence of factors such as the air tightness of the earphone.
Description
Technical Field
The application relates to the technical field of acoustics, concretely relates to bluetooth headset noise reduction system.
Background
Anc (active Noise cancellation), namely, active Noise reduction, is a Noise reduction technology and is mainly applied to Noise reduction of a bluetooth headset. The active noise reduction Bluetooth headset realizes active noise reduction by the fact that reverse audio signals generated by a secondary sound source (headset loudspeaker) are equal in amplitude and opposite in phase with ambient noise. Usually can the bluetooth headset's treater before the use can obtain the parameter of making an uproar according to ambient noise, then carry out the opposition process to ambient noise signal according to the parameter of making an uproar, obtain the reverse audio signal of ideal, but bluetooth headset receives the influence of gas tightness etc. when in actual use, earphone loudspeaker has the error according to the reverse audio signal and the ideal value of the play of the aforesaid parameter of making an uproar, this can influence bluetooth headset's the noise reduction effect, the factors such as the gas tightness of different earphones are different, lead to a plurality of bluetooth headset's the performance of making an uproar can't keep the unanimity, the final off-the-shelf percent.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a noise reduction system for a bluetooth headset, so as to solve the problem of inconsistent noise reduction performance of the existing bluetooth headset.
The application provides a bluetooth headset noise reduction system includes:
the Bluetooth headset comprises a headset shell, a headset loudspeaker, a headset reference microphone, a headset contact and a headset processor, wherein the headset loudspeaker, the headset reference microphone, the headset contact and the headset processor are arranged in the headset shell; the earphone reference microphone is used for collecting environmental noise and transmitting the environmental noise to the earphone processor; the earphone processor is used for carrying out sound anti-phase processing; the earphone loudspeaker plays the reversed audio signal after the reversed phase processing;
the error microphone is arranged outside the earphone shell, is connected with the earphone processor through the earphone contact and is used for collecting reverse audio signals played by the earphone loudspeaker and audio signals of environmental noise and transmitting the audio signals to the earphone processor.
Optionally, the system further comprises a noise source arranged outside the bluetooth headset and used for playing the simulation environment noise.
Optionally, the noise reduction system for the bluetooth headset further includes two capacitors respectively disposed between the error microphone and the headset contact, and between the headset contact and the headset processor.
Optionally, the earphone further comprises a main control module, an artificial ear microphone, a first contact and a second contact, the main control module, the artificial ear microphone, the error microphone and the first contact are arranged outside the earphone shell, the artificial ear microphone is connected with the main control module, the main control module is connected with the second contact, and the earphone contact is used for selecting and gating the first contact or the second contact so as to be connected with the error microphone or the main control module; the main control module is used for analyzing the audio information collected by the artificial ear microphone.
Optionally, still include the bluetooth adapter, host system includes control processor and host computer, control processor includes first end and second end, connects respectively second contact and host computer, the bluetooth adapter with the host computer is connected for establish the host computer with bluetooth headset's bluetooth is connected.
Optionally, the main control module further includes a signal processor, and the artificial ear microphone is connected to the upper computer through the signal processor.
Optionally, the noise source is connected to the main control module.
Optionally, the earphone contact is detachably connected with the first contact or the second contact.
Optionally, the headset processor further includes a fourth terminal, the bluetooth headset noise reduction system further includes a first switch and a second switch, the headset processor is configured to selectively disconnect the first switch and the second switch, the fourth terminal of the headset processor is connected to one end of the first switch, the other end of the first switch is connected to a first end of one of the capacitors, and a second end of the capacitor is connected to the headset contact; and the third end of the earphone processor is connected with one end of the second switch, and the other end of the second switch is connected with the earphone contact.
Optionally, the bluetooth headset noise reduction system further comprises an artificial ear cavity, the error microphone and the artificial ear microphone are arranged in the artificial ear cavity, and the headset speaker is located at an inlet of the artificial ear cavity.
The above-mentioned bluetooth headset noise reduction system of this application, through setting up the error wheat, the signal feedback to the earphone treater after the reverse audio signal of the earphone loudspeaker broadcast that acquires the error wheat and the audio signal of ambient noise offset, if because factors such as gas tightness lead to this reverse audio signal to differ with the ideal value, the difference signal after ambient noise and reverse audio signal offset just can be gathered to the error wheat, the parameter of making an uproar falls in earphone treater combination difference signal and ambient noise adjustment, thereby reduce the influence of factors such as earphone gas tightness, reduce the reverse audio signal of broadcast and the difference of ideal value, improve the earphone and fall the uniformity of performance of making an uproar.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a noise reduction system of a bluetooth headset according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a noise reduction system for a bluetooth headset according to another embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The following embodiments and their technical features may be combined with each other without conflict.
As shown in fig. 1, the noise reduction system of the bluetooth headset comprises a bluetooth headset and an error microphone 21, the bluetooth headset comprises a headset housing 10, and an earphone speaker 13, an earphone reference microphone 12, an earphone contact 14 and an earphone processor 11 disposed in the earphone housing 10, wherein the earphone processor 11 is a processor commonly used in the art and applied to a bluetooth earphone, and is integrated with a bluetooth module, the earphone processor 11 includes a first end, a second end and a third end respectively connected to the earphone speaker 13, the earphone reference microphone 12 and the earphone contact 14, the earphone reference microphone 12 is a commonly used sound collecting element, such as a sound sensor or a microphone, etc., the earphone processor 11 is used for collecting environmental noise and transmitting signals to the earphone processor 11, the earphone processor 11 is used for conducting sound phase inversion processing and outputting signals to the earphone loudspeaker 13, and the earphone loudspeaker 13 plays reverse audio signals to offset part of the environmental noise to achieve the noise reduction effect. The error microphone 21 is arranged outside the earphone shell 10, is detachably connected with the earphone contact 14, is connected with the earphone processor 11 through the earphone contact 14 to form a feedback loop, and is used for acquiring a difference signal after the reverse audio signal played by the earphone loudspeaker 13 and the audio signal of the environmental noise are cancelled out, and transmitting the difference signal to the earphone processor 11.
When the noise reduction parameter is adjusted by using the bluetooth headset noise reduction system, the headset reference microphone 12 collects the environmental noise and transmits the environmental noise to the headset processor 11, the headset processor 11 performs reverse phase processing on the audio signal of the environmental noise, then transmits the processed signal to the headset loudspeaker 13, and plays a reverse audio signal through the headset loudspeaker 13 to offset part of the environmental noise. The error microphone 21 is arranged near the sound outlet of the earphone speaker 13, collects difference signals after the environmental noise and the reverse audio signals are cancelled out, transmits the difference signals to the earphone processor 11, the earphone processor 11 adjusts the noise reduction parameters by combining the difference signals fed back by the error microphone 21, then carries out reverse phase processing on the environmental noise collected by the earphone reference microphone 12, plays the adjusted reverse audio signals through the earphone speaker 13, stores the corresponding noise reduction parameters in the earphone processor 11, finally disconnects the connection with the error microphone 21, completes the noise reduction parameter adjustment of the Bluetooth earphone, and the Bluetooth earphone directly carries out noise reduction processing through the noise reduction parameters recorded in the earphone processor 11 when noise reduction is needed.
In some embodiments, the earphone processor may record different noise reduction parameters for different environmental noises in the noise reduction parameter adjustment process, and set the bluetooth earphone noise reduction system in different environments, such as a factory, a train station, a library, and the like, and record corresponding noise reduction parameters for different environmental noises, and the earphone processor 11 may adjust a corresponding noise reduction mode in response to the environmental noises collected by the earphone reference microphone 12, and play a corresponding reverse audio signal, so as to meet the noise reduction requirements in different scenes, and achieve a better noise reduction effect. In some embodiments, the selection of the noise reduction mode may also be performed by a user, for example, by setting a switch, a button, or the like on the bluetooth headset, or by an application program of the smart terminal, the user may select the noise reduction mode by himself.
The above-mentioned bluetooth headset noise reduction system of this application, through setting up error wheat 21, signal feedback to earphone treater 11 after the audio signal of the reverse audio signal of earphone loudspeaker 13 broadcast that acquires error wheat 21 and ambient noise offsets, if because factors such as gas tightness lead to this reverse audio signal to differ with the ideal value, error wheat 21 just can gather the difference signal after ambient noise and reverse audio signal offset, earphone treater 11 can combine difference signal and ambient noise adjustment to fall the parameter of making an uproar, thereby reduce the influence of factors such as earphone gas tightness, reduce the reverse audio signal of broadcast and the difference of ideal value, improve the uniformity of earphone noise reduction performance.
In some embodiments, as shown in fig. 2, the noise reduction system of the bluetooth headset further includes a noise source 31, configured to play a simulated environment noise to improve stability of the environment noise, and can simulate the environment noise under a plurality of different scenes through the noise source 31, without placing the noise reduction system of the bluetooth headset into different environments for testing, so as to improve efficiency and effectiveness of adjusting noise reduction parameters.
In some embodiments, as shown in fig. 2, two capacitors are disposed in the feedback loop formed by the error microphone 21 and the headphone processor 11, and are respectively disposed between the error microphone 21 and the headphone contact 14, and between the headphone contact 14 and the headphone processor 11, for isolating the dc offset and coupling the ac signal of the error microphone 21. In some embodiments, as shown in fig. 2, the bluetooth headset noise reduction system further includes a first switch S1 and a second switch S2, the headset processor 11 further includes a fourth terminal, the fourth terminal of the headset processor 11 is connected to one terminal of the first switch S1, the other terminal of the first switch S1 is connected to the first terminal of one of the capacitors C1, the second terminal of the capacitor C1 is connected to the headset contact 14, the third terminal of the headset processor 11 is connected to one terminal of the second switch S2, and the other terminal of the second switch S2 is connected to the headset contact 14. The earphone processor 11 is configured to selectively open the first switch S1 and the second switch S2, and in practical use, when the error microphone 21 needs to be connected to feed back the mixed signal, the first switch S1 is closed, and the second switch S2 is opened, so that the ac signal of the error microphone 21 is coupled through the capacitor C1; when the earphone contact 14 is needed to be used for connecting other external devices, the first switch S1 is opened, the second switch S2 is closed, and the earphone processor 11 is connected to the external device through the earphone contact 14; when the headset is used alone, the first switch S1 and the second switch S2 are simultaneously turned off.
In some embodiments, as shown in fig. 2, the bluetooth headset noise reduction system further includes a main control module 40, an artificial ear microphone 32, a first contact, a second contact and a bluetooth adapter 33, which are disposed outside the headset housing 10, wherein the error microphone 21 is connected to a first end of a capacitor C2, a second end of the capacitor C2 is connected to the first contact, the artificial ear microphone 32 and the bluetooth adapter 33 are respectively connected to the main control module 40, the main control module 40 is connected to the second contact, and the headset contact 14 is used for connecting the error microphone 21 or the main control module 40 to the first contact or the second contact. The main control module 40 is used for receiving the audio information collected by the artificial ear microphone 32 and sending the bluetooth information of the earphone to the bluetooth adapter 33. Specifically, the main control module 40 includes a control processor 41, an upper computer 42 and a signal processor 43, the control processor 41 includes a first end and a second end, the first end and the second end are respectively connected to the second contact and the upper computer 42, the control processor 41, the first contact, the second contact and a capacitor C2 form a control board 51 for transmitting communication signals, the bluetooth headset is further provided with a grounding contact (not numbered in the figure) for enabling the bluetooth headset and the control board 51 to form a common ground, and the stability of signal transmission is improved. The artificial ear microphone 32 is connected with the upper computer 42 through the signal processor 43, and the Bluetooth adapter 33 is connected with the upper computer 42 and used for establishing Bluetooth connection between the upper computer 42 and a Bluetooth earphone. The noise source 31 is connected to the upper computer 42 of the main control module 40, and the noise source 31 simulates different types of environmental noise in response to the control of the upper computer 42.
During the in-service use, can make host computer 42 establish the bluetooth connection with bluetooth headset before the parameter of making an uproar falls in the adjustment in advance, connect the second contact with earphone contact 14, disconnection first switch S1, closed second switch S2, earphone treater 11 and control processor 41 communication connection, it has bluetooth module to integrate in earphone treater 11, or be connected with bluetooth module, earphone treater 11 sends bluetooth module' S bluetooth address to control processor 41, control processor 41 controls bluetooth headset adjustment to fall the performance optimization mode of making an uproar, avoid other bluetooth device that earphone automatic connection paired. The control processor 41 receives the bluetooth address and then sends the bluetooth address to the upper computer 42, and the upper computer 42 establishes bluetooth connection with the bluetooth headset through the bluetooth adapter 33. Establish wired connection through host computer and bluetooth headset for the bluetooth of host computer and bluetooth headset is connected, shortens the bluetooth connection time when adjusting the parameter of making an uproar of falling of a plurality of earphones one by one.
When the noise reduction parameters are adjusted, the upper computer 42 controls the noise source 31 to play the designated simulated environment noise, such as a noise signal, a white noise signal, or a specific scene (library, factory, airport, etc.), but is not limited thereto, the earphone contact 14 is connected to the first contact, the first switch S1 is closed, the second switch S2 is opened, the earphone processor 11 adjusts the noise reduction parameters of the bluetooth earphone in combination with the audio signal of the environmental noise collected by the earphone reference microphone 12 and the difference signal collected by the error microphone 21, the adjusted noise reduction parameters are recorded in the earphone processor 11, then the earphone processor 11 sends the signal of the noise reduction parameter adjustment completion to the upper computer 42, and the upper computer 42 tests the bluetooth earphone.
When testing, the earphone contact breaks off the connection with other contacts, break off first switch S1 and second switch S2, host computer 42 controls noise source 31 to play test audio signal, and control the bluetooth earphone through bluetooth adapter 33 and open and close the function of making an uproar respectively, the audio signal after opening and closing the main function of making an uproar is gathered respectively to artifical ear microphone 32, the audio signal that artifical ear microphone 32 gathered passes through signal processor 43 back transmission to host computer 42, whether qualified by host computer 42 aassessment bluetooth earphone. During concrete implementation, the upper computer evaluates that the audio information meets the preset performance index, namely that the Bluetooth headset is qualified. The performance index may be obtained by comparing audio signals collected by the artificial ear microphone after the noise reduction function of the bluetooth headset is turned on and off, for example, a noise peak difference between the two audio signals, or a difference between decibel mean values between the two audio signals, and the like, and is not limited herein and may be adjusted according to an actual application scenario. The signal processor 43 in this embodiment is used for performing signal processing on the audio signal collected by the artificial ear microphone 32, and the content of the signal processing includes, but is not limited to, transformation, filtering, modulation, etc. which are commonly used in the art, and adopts a signal processing method which is commonly used in the prior art.
In some embodiments, as shown in fig. 2, the noise reduction system of the bluetooth headset further includes an artificial ear cavity 61, which is used for simulating the structure of the external auditory canal of a human body, the error microphone 21 and the artificial ear microphone 32 are disposed inside the artificial ear cavity 61, the bluetooth headset is disposed outside the artificial ear cavity 61, and the headset speaker 13 is located at the entrance of the artificial ear cavity 61, so that the reverse audio signal played by the headset speaker 13 can be collected by the error microphone 21 and the artificial ear microphone 32 after passing through the artificial ear cavity 61, thereby improving the authenticity of the audio signal collected by the error microphone 21 and the artificial ear microphone 32, and making the reverse audio signal played by the bluetooth headset more conform to the visual feeling when the human ear is used.
Although the application has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. This application is intended to embrace all such modifications and variations and is limited only by the scope of the appended claims. In particular regard to the various functions performed by the above described components, the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the specification.
That is, the above description is only an embodiment of the present application, and not intended to limit the scope of the present application, and all equivalent structures or equivalent flow transformations made by using the contents of the specification and the drawings, such as mutual combination of technical features between various embodiments, or direct or indirect application to other related technical fields, are included in the scope of the present application.
In addition, in the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be considered as limiting the present application. In addition, structural elements having the same or similar characteristics may be identified by the same or different reference numerals. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The previous description is provided to enable any person skilled in the art to make and use the present application. In the foregoing description, various details have been set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not shown in detail to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Claims (10)
1. A bluetooth headset noise reduction system, comprising:
the Bluetooth headset comprises a headset shell, a headset loudspeaker, a headset reference microphone, a headset contact and a headset processor, wherein the headset loudspeaker, the headset reference microphone, the headset contact and the headset processor are arranged in the headset shell; the earphone reference microphone is used for collecting environmental noise and transmitting the environmental noise to the earphone processor; the earphone processor is used for carrying out sound anti-phase processing; the earphone loudspeaker plays the reversed audio signal after the reversed phase processing;
the error microphone is arranged outside the earphone shell, is connected with the earphone processor through the earphone contact and is used for collecting reverse audio signals played by the earphone loudspeaker and audio signals of environmental noise and transmitting the audio signals to the earphone processor.
2. The noise reduction system for a bluetooth headset of claim 1, further comprising a noise source disposed outside the bluetooth headset for playing back the simulated environmental noise.
3. The system of claim 2, further comprising two capacitors disposed between the error microphone and the earphone contact and between the earphone contact and the earphone processor.
4. The system of claim 3, further comprising a main control module, an artificial ear microphone, a first contact and a second contact, the artificial ear microphone being connected to the main control module, the error microphone being connected to the first contact, the main control module being connected to the second contact, the earphone contact being configured to selectively gate the first contact or the second contact to connect the error microphone or the main control module; the main control module is used for analyzing the audio information collected by the artificial ear microphone.
5. The noise reduction system for the Bluetooth headset of claim 4, further comprising a Bluetooth adapter, wherein the main control module comprises a control processor and an upper computer, the control processor comprises a first end and a second end, the first end and the second end are respectively connected with the second contact and the upper computer, and the Bluetooth adapter is connected with the upper computer and used for establishing Bluetooth connection between the upper computer and the Bluetooth headset.
6. The system of claim 5, wherein the master control module further comprises a signal processor, and the artificial ear microphone is connected to the upper computer through the signal processor.
7. The system of claim 4, wherein the noise source is connected to the master control module.
8. The noise reduction system for bluetooth headsets of claim 4, wherein the headset contact is detachably connected to the first contact or the second contact.
9. The bluetooth headset noise reduction system according to claim 4, wherein the headset processor further comprises a fourth terminal, the bluetooth headset noise reduction system further comprises a first switch and a second switch, the headset processor is configured to selectively disconnect the first switch and the second switch, the fourth terminal of the headset processor is connected to one terminal of the first switch, the other terminal of the first switch is connected to the first terminal of one of the capacitors, and the second terminal of the capacitor is connected to the headset contact; and the third end of the earphone processor is connected with one end of the second switch, and the other end of the second switch is connected with the earphone contact.
10. The bluetooth headset noise reduction system of claim 1, further comprising an artificial ear cavity, wherein the error microphone and the artificial ear microphone are disposed within the artificial ear cavity, and wherein the headset speaker is located at an inlet of the artificial ear cavity.
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| CN202022038051.7U CN213186477U (en) | 2020-09-17 | 2020-09-17 | Bluetooth headset noise reduction system |
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| CN202022038051.7U CN213186477U (en) | 2020-09-17 | 2020-09-17 | Bluetooth headset noise reduction system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113923577A (en) * | 2021-09-09 | 2022-01-11 | 珠海慧联科技有限公司 | Acoustic response measurement system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113923577A (en) * | 2021-09-09 | 2022-01-11 | 珠海慧联科技有限公司 | Acoustic response measurement system and method |
| CN113923577B (en) * | 2021-09-09 | 2023-12-01 | 珠海慧联科技有限公司 | Acoustic response measurement system and method |
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Address after: 519000 No. 333, Kexing Road, Xiangzhou District, Zhuhai City, Guangdong Province Patentee after: ZHUHAI JIELI TECHNOLOGY Co.,Ltd. Address before: 519000 Complex Building 9 (1-4 floors), No. 107, Shihua West Road, Jida, Zhuhai, Guangdong Patentee before: ZHUHAI JIELI TECHNOLOGY Co.,Ltd. |