CN212211359U - ANC earphone - Google Patents

Abstract

The embodiment of the application discloses an ANC earphone belongs to earphone technical field. The ANC headset includes: the device comprises a front cover, a rear cover, an audio sound cavity, a noise reduction cavity, an audio horn arranged in the audio sound cavity and a noise reduction horn arranged in the noise reduction cavity; the front cover and the rear cover form a hollow shell; the audio frequency sound cavity and the noise reduction sound cavity are arranged in the hollow shell; the audio frequency sound cavity and the noise reduction sound cavity are independent, and the cavities are staggered in parallel. The technical scheme that this application provided is through at built-in audio loudspeaker of earphone and the loudspeaker of making an uproar that falls, and audio loudspeaker is used for the broadcast audio signal, and the loudspeaker of making an uproar that falls is used for the broadcast to fall and falls the signal of making an uproar, and both divide work, handle respective signal alone, consequently audio signal and fall each other noninterference between the signal of making an uproar to the noise reduction effect and the earphone tone quality of ANC earphone have been improved. In addition, because the sound cavities where the two loudspeakers are located are arranged in a parallel and staggered mode, the internal space of the earphone is reasonably utilized, and the size of the earphone is reduced.

Description

ANC earphone

Technical Field

The present application relates to the field of earphone technologies, and in particular, to an ANC (Active Noise Cancellation, Active Noise reduction) earphone.

Background

The ANC technique is a technique for generating a reverse-phase sound wave equal to external noise by a noise reduction system to neutralize the noise, thereby achieving a noise reduction effect. At present, most noise reduction earphones in the market adopt an ANC technology to reduce noise.

In the related art, the ANC earphone adopts a single speaker to perform noise reduction, and the specific contents are as follows: the ANC processor generates an inverse noise signal by receiving and processing a noise signal detected by the microphone from the outside. A speaker is arranged in the front cavity of the earphone, the speaker is used for receiving the reverse phase noise signal provided by the ANC processor and reducing the reverse phase noise to neutralize the noise in the outside, and meanwhile, the speaker is also used for receiving and reducing audio signals played to a user, such as a voice, a song, a conversation in a movie and the like.

Because the earphone speaker needs to process two sound signals at the same time, the two sound signals can interfere with each other at the time, so that the noise reduction effect and the sound quality of the earphone are reduced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an ANC earphone, and the technical scheme is as follows:

according to an aspect of an embodiment of the present application, there is provided an ANC headset including: the device comprises a front cover, a rear cover, an audio sound cavity, a noise reduction cavity, an audio horn arranged in the audio sound cavity, and a noise reduction horn arranged in the noise reduction cavity;

the front cover and the rear cover form a hollow shell;

the audio frequency sound cavity and the noise reduction sound cavity are arranged in the hollow shell;

the audio frequency sound cavity and the noise reduction sound cavity are independent, and the cavities are staggered in parallel.

Optionally, the audio speaker and the noise reduction speaker face towards the front cover, and the audio speaker and the noise reduction speaker are arranged in a parallel staggered manner.

Optionally, a distance between the noise reduction speaker and the front cover is smaller than a distance between the audio speaker and the front cover.

Optionally, the ANC headset further includes an anti-vibration module, where the anti-vibration module is configured to prevent mutual interference caused by vibration of the audio speaker and the noise reduction speaker.

Optionally, the anti-vibration module comprises:

a first vibration preventing member provided at a connecting position of the audio sound chamber and the front cover;

and/or the presence of a gas in the gas,

a first vibration preventing member provided at a connecting position of the audio sound chamber and the rear cover;

and/or the presence of a gas in the gas,

and the third vibration prevention component is arranged at the connecting position of the audio sound cavity and the noise reduction sound cavity.

Optionally, the ANC headset further comprises: a first noise reduction microphone and a second noise reduction microphone;

the first noise reduction microphone is used for collecting noise signals inside the earphone;

the second noise reduction microphone is used for collecting noise signals outside the earphone.

Optionally, the first noise reducing microphone is disposed on the front cover, and the second noise reducing microphone is disposed on the back cover.

Optionally, the ANC headset further comprises an ANC processor;

the first noise reduction microphone, the second noise reduction microphone and the noise reduction loudspeaker are electrically connected with the ANC processor respectively.

Optionally, the ANC earphone further comprises a sound guide tube, and the sound guide tube communicates the audio sound cavity and the outside of the earphone.

Optionally, the ANC headset is an in-ear headset.

The technical scheme provided by the embodiment of the application can bring the following beneficial effects:

through at built-in audio horn of earphone and the loudspeaker of making an uproar that falls, audio horn is used for the broadcast audio signal, and the loudspeaker of making an uproar that falls is used for the broadcast signal of making an uproar, and both divide work, handle respective signal alone, consequently audio signal and fall each other noninterference between the signal of making an uproar to the noise reduction effect and the earphone tone quality of ANC earphone have been improved. In addition, because the sound cavities where the two loudspeakers are located are arranged in a parallel and staggered mode, the internal space of the earphone is reasonably utilized, and the size of the earphone is reduced.

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 diagram of a signal processing process of an ANC headset provided in the related art;

fig. 2 is a schematic structural diagram of an ANC headset according to an embodiment of the present application;

fig. 3 is a schematic diagram of a signal processing process of an ANC headset according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of an ANC headset according to another embodiment of the present application.

Illustration of the drawings:

11. front cover 12, back cover

13. Audio frequency sound cavity 14 and noise reduction sound cavity

15. Audio speaker 16 and noise reduction speaker

17. Vibration-proof module 18 and noise-reduction microphone

19. Sound guide tube 20 and ANC processor

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, a schematic diagram of a signal processing process of an ANC earphone provided in the related art is shown, where the ANC earphone includes an external microphone, an internal microphone, an ANC processor, and a speaker. The specific signal processing process is as follows:

the external microphone and the internal microphone are electrically connected with the ANC processor, the internal microphone is arranged in the front cavity of the earphone and used for detecting noise signals inside the earphone, the external microphone is arranged outside the front cavity of the earphone and used for detecting noise signals outside the earphone, and the internal microphone and the external microphone transmit the detected noise signals to the ANC processor.

The ANC processor is electrically connected with a loudspeaker in the front cavity of the earphone, receives noise signals from the internal microphone and the external microphone, generates an ANC signal based on the noise signals, and finally transmits the ANC signal to the loudspeaker.

And after receiving the ANC signal from the ANC processor, the loudspeaker restores the ANC signal to play. In addition, the loudspeaker can restore and play the audio signal received from the user audio module, so that the loudspeaker is used for restoring and playing the ANC signal and the audio signal at the same time.

Please refer to fig. 2, which shows a schematic structural diagram of an ANC headset according to an embodiment of the present application, the ANC headset includes: a front cover 11, a rear cover 12, an audio sound chamber 13, a noise reduction chamber 14, an audio horn 15 disposed in the audio sound chamber 13, and a noise reduction horn 16 disposed in the noise reduction chamber 14.

The front cover 11 and the rear cover 12 form a hollow shell, wherein the main body of the rear cover 12 is bowl-shaped and can concentrate the sound to the direction of the front cover 11, and the front cover 11 is a round plate-shaped object which can be matched with the bowl opening of the bowl-shaped main body of the rear cover 12 to form a hollow shell. The hollow shell is matched with the inner contour of the human ear, is bowl-shaped as a whole, is hollow inside and is provided with a storage space.

The storage space reserved in the hollow shell is provided with an audio sound cavity 13 and a noise reduction cavity 14, the audio sound cavity 13 and the noise reduction cavity 14 are two independent sound cavities, a hollow storage space is respectively arranged in the audio sound cavity 13 and the noise reduction cavity 14, and the two sound cavities are isolated from each other. An audio horn 15 is arranged in the storage space of the audio cavity 13, and a noise reduction horn 16 is arranged in the storage space of the noise reduction cavity 14. It should be noted that, in the embodiment of the present application, the number of the audio speakers 15 included in the audio cavity 13 is not limited, and for example, it may be one or multiple; similarly, the number of the noise reduction horns 16 included in the noise reduction chamber 14 is not limited, and may be one or more, for example.

Alternatively, the audio sound cavity 13 and the noise reduction cavity 14 are provided on the cover wall of the front cover 11 toward the rear cover 12, that is, on the inner face of the front cover 11, the cavity face of the audio sound cavity 13 is flush with the inner face of the front cover 11, and the cavity face of the noise reduction cavity 14 is also flush with the inner face of the front cover 11, so that the audio sound cavity 13 and the noise reduction cavity 14 are on the same horizontal plane with the inner face of the front cover 11 as a reference. Optionally, the audio cavity 13 is connected to the noise reduction cavity 14, and a part of the connecting portion of the audio cavity 13 and the noise reduction cavity 14 overlaps to form a misalignment.

As shown in fig. 3, which schematically illustrates a schematic diagram of a signal processing process of an ANC headset according to an embodiment of the present application. The external microphone and the internal microphone are electrically connected with the ANC processor, the internal microphone is arranged in the front cavity of the earphone and used for detecting noise signals inside the earphone, the external microphone is arranged outside the front cavity of the earphone and used for detecting noise signals outside the earphone, and the internal microphone and the external microphone transmit the detected noise signals to the ANC processor.

The ANC processor is electrically connected with the noise reduction loudspeaker, receives noise signals from the internal microphone and the external microphone, generates an ANC signal based on the noise signals, and finally transmits the ANC signal to the noise reduction loudspeaker. And after receiving the ANC signal from the ANC processor, the noise reduction loudspeaker restores the ANC signal to play.

In addition, the audio user module is electrically connected with the audio loudspeaker, the audio user module transmits an audio signal to the audio loudspeaker, and the audio loudspeaker restores and plays the audio signal.

To sum up, the technical scheme that this application embodiment provided through at built-in audio loudspeaker of earphone with fall the loudspeaker of making an uproar, audio loudspeaker is used for the broadcast audio signal, falls the loudspeaker of making an uproar and is used for the broadcast to fall the signal of making an uproar, both divide the work of doing a job, handle respective signal alone, consequently audio signal and fall do an uproar between the signal mutually noninterference to the noise reduction effect and the earphone tone quality of ANC earphone have been improved. In addition, because the sound cavities where the two loudspeakers are located are arranged in a parallel and staggered mode, the internal space of the earphone is reasonably utilized, and the size of the earphone is reduced.

Referring to fig. 4, a schematic structural diagram of an ANC headset according to another embodiment of the present application is shown, where the ANC headset includes: a front cover 11, a rear cover 12, an audio sound chamber 13, a noise reduction chamber 14, an audio horn 15 disposed in the audio sound chamber 13, and a noise reduction horn 16 disposed in the noise reduction chamber 14.

The front cover 11 and the rear cover 12 form a hollow cavity, and the noise reduction cavity 14, the audio cavity 13 and the ANC processor 20 are arranged in the hollow cavity. The noise reduction chamber 14 includes a noise reduction horn 16 therein and the audio chamber 13 includes an audio horn 15 therein.

Alternatively, the audio cavity 13 and the noise reduction cavity 14 may be in a parallel offset arrangement. The audio cavity 13 and the noise reduction cavity 14 are disposed on the cover wall of the front cover 11 facing the back cover 12, that is, disposed on the inner surface of the front cover 11, the cavity surface of the audio cavity 13 is flush with the inner surface of the front cover 11, and the cavity surface of the noise reduction cavity 14 is also flush with the inner surface of the front cover 11, so that the audio cavity 13 and the noise reduction cavity 14 are located on the same horizontal plane with the inner surface of the front cover 11 as a reference. And the audio frequency sound cavity 13 is connected with the noise reduction cavity 14 and is placed, and the part of the connection part of the audio frequency sound cavity 13 and the noise reduction cavity 14 is overlapped by partial cavities to form dislocation, so that the space occupied by the audio frequency sound cavity 13 and the noise reduction cavity 14 is reduced.

Alternatively, the audio speaker 15 is horizontally arranged in the audio sound cavity 13 in a direction towards the front cover 11, the noise reduction speaker 16 is also horizontally arranged in the noise reduction cavity 14 in a direction towards the front cover 11, and the audio speaker 15 and the noise reduction speaker 16 are also in a parallel offset state because the audio sound cavity 13 and the noise reduction cavity 14 are in a parallel offset arrangement.

Optionally, the distance between the noise reduction speaker 16 and the front cover 11 is smaller than the distance between the audio speaker 15 and the front cover 11. Wherein, because the distance between the loudspeaker 16 of making an uproar and the protecgulum 11 of making an uproar is less than the distance between audio loudspeaker 15 and the protecgulum 11, so the signal of making an uproar that falls of the loudspeaker 16 broadcast of making an uproar will direct action be external in the earphone, fall the signal of making an uproar and can form the interference to audio loudspeaker 15 through the back radiation, and the signal of making an uproar of falling this moment has weakened, thereby avoided directly disturbing audio loudspeaker 15, reached and weakened the purpose that the signal of making an uproar disturbed audio loudspeaker 15.

Optionally, the ANC headset further comprises an anti-vibration module 17, wherein the anti-vibration module 17 is configured to prevent mutual interference caused by vibration of the audio speaker 15 and the noise reduction speaker 16. The sound comes out from the noise reduction cavity 14 and is transmitted to the audio cavity 13 only after being processed by the anti-vibration module 17, otherwise, the sound coming out from the audio cavity 13 is transmitted to the noise reduction cavity 14 also after being processed by the anti-vibration module 17, and the sound processed by the anti-vibration module 17 can weaken the interference on the noise reduction loudspeaker 16 and the audio loudspeaker 15.

Optionally, the position where the anti-vibration module 17 is disposed further includes at least one of:

1. the first anti-vibration part is arranged at the connecting position of the audio cavity and the front cover;

2. the second anti-vibration component is arranged at the connecting position of the audio cavity and the rear cover;

3. the third prevention of shaking part sets up in audio frequency sound chamber and the hookup location department of making an uproar sound chamber of falling.

In one example, the anti-vibration module 17 may be disposed at a connection position of the audio sound cavity and the front cover 11, a connection position of the audio sound cavity 13 and the rear cover 12, and a connection position of the audio sound cavity 13 and the noise reduction cavity 14. Alternatively, the anti-vibration module 17 may be disposed at the 2-position or the 3-position, which is not limited herein.

Optionally, the ANC headset further comprises at least one of a first noise reduction microphone and a second noise reduction microphone:

1. the first noise reduction microphone is used for collecting noise signals inside the earphone;

2. the second noise reduction microphone is used for collecting noise signals outside the earphone.

In one example, the ANC headset further includes a noise reduction microphone 18, the noise reduction microphone 18 being disposed on the front cover 11, optionally, the noise reduction microphone 18 may also be disposed on the back cover 12. In addition, the noise reduction microphone 18 is electrically connected to the ANC processor 20. The noise reduction microphone 18 is configured to collect a noise signal from the outside, and transmit the noise signal to the ANC processor 20, and the ANC processor 20 generates a noise reduction signal based on the noise signal, where the noise reduction signal is a signal having the same frequency spectrum as the noise signal but a phase difference of 180 °, for example, a detected noise signal having a size of 10 db linearly distributed over time by plus 180 °, and a detected noise signal having a size of 10 db linearly distributed over time by minus 180 °, and the two noise reduction signals can cancel each other.

Optionally, the noise reduction microphone 18 may be disposed inside the hollow cavity of the earphone for collecting noise signals inside the earphone, may also be disposed outside the hollow cavity of the earphone for collecting noise signals outside the earphone, and may also be disposed inside and outside the hollow cavity of the earphone for collecting noise signals inside and outside the earphone. After generating the noise reduction signal, the ANC processor 20 feeds the noise reduction signal back to the noise reduction speaker 16 electrically connected to the ANC processor, and finally plays the noise reduction signal through the noise reduction speaker 16.

Optionally, the ANC earphone further includes a sound guiding tube 19, where the sound guiding tube 19 is disposed at a junction of the rear cover 12 and the audio sound cavity 13, and connects the rear cover 12 and the audio sound cavity 13, so as to communicate the audio sound cavity 13 with the outside of the earphone. In the embodiment of the present application, the number and the positions of the sound guide tubes 19 are not limited, and this may be designed according to actual situations.

Optionally, the ANC headset is an in-ear headset. The in-ear earphone is an earphone which can be inserted into an ear canal and can be cylindrical or cylindrical, or bowl-shaped or spherical. In addition, because the noise reduction cavity 14 and the audio sound cavity 13 are arranged in parallel in a staggered manner, the occupation of the internal space of the earphone is reduced, so that the volume of the earphone is reduced, and the earphone is more beneficial to being used in the ear.

To sum up, the technical scheme that this application embodiment provided is through at built-in audio loudspeaker of earphone and fall the loudspeaker of making an uproar, and audio loudspeaker is used for broadcast audio signal, falls the loudspeaker of making an uproar and is used for broadcasting and fall the signal of making an uproar, and both divide the work of doing a job, handle respective signal alone, consequently audio signal and fall do not interfere with each other between the signal of making an uproar to ANC earphone's noise reduction effect and earphone tone quality have been improved. In addition, because the sound cavities where the two loudspeakers are located are arranged in a parallel and staggered mode, the internal space of the earphone is reasonably utilized, and the size of the earphone is reduced.

In addition, still through the parallel dislocation set of loudspeaker and audio frequency loudspeaker of making an uproar that falls to the distance that loudspeaker were made an uproar were settled at the protecgulum is less than the distance of audio frequency loudspeaker and protecgulum, and from avoiding making an uproar signal directly to audio signal interfere with. Meanwhile, the anti-vibration module is additionally arranged, so that the interference between the noise reduction signal and the audio signal is further reduced.

The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. An ANC headset, comprising: the device comprises a front cover, a rear cover, an audio sound cavity, a noise reduction cavity, an audio horn arranged in the audio sound cavity, and a noise reduction horn arranged in the noise reduction cavity;

the front cover and the rear cover form a hollow shell;

the audio frequency sound cavity and the noise reduction sound cavity are arranged in the hollow shell;

the audio frequency sound cavity and the noise reduction sound cavity are independent, and the cavities are staggered in parallel.

2. The ANC headset of claim 1, wherein the audio speaker and the noise reduction speaker are oriented toward the bezel and are disposed in parallel offset relation.

3. The ANC earpiece of claim 2, wherein a distance between the noise reduction speaker and the front cover is less than a distance between the audio speaker and the front cover.

4. The ANC headset of claim 1, further comprising an anti-vibration module configured to prevent interference from vibrations of the audio horn and the noise reduction horn.

5. The ANC headset of claim 4, wherein the anti-vibration module comprises:

a first vibration preventing member provided at a connecting position of the audio sound chamber and the front cover;

and/or the presence of a gas in the gas,

a second vibration preventing member provided at a connecting position of the audio sound chamber and the rear cover;

and/or the presence of a gas in the gas,

and the third vibration prevention component is arranged at the connecting position of the audio sound cavity and the noise reduction sound cavity.

6. The ANC headset of claim 1, further comprising: a first noise reduction microphone and a second noise reduction microphone;

the first noise reduction microphone is used for collecting noise signals inside the earphone;

the second noise reduction microphone is used for collecting noise signals outside the earphone.

7. The ANC headset of claim 6, wherein the first noise-reducing microphone is disposed on the front cover and the second noise-reducing microphone is disposed on the back cover.

8. The ANC earpiece of claim 6, wherein the ANC earpiece further includes an ANC processor;

the first noise reduction microphone, the second noise reduction microphone and the noise reduction loudspeaker are electrically connected with the ANC processor respectively.

9. The ANC earpiece of any of claims 1-8, further comprising a sound conduit communicating the audio sound cavity with an exterior of the earpiece.

10. The ANC headset of any one of claims 1-8, wherein the ANC headset is an in-ear headset.

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