CN109348323B

CN109348323B - Microphone structure

Info

Publication number: CN109348323B
Application number: CN201811109628.XA
Authority: CN
Inventors: 丁火根
Original assignee: Nubia Technology Co Ltd
Current assignee: Nubia Technology Co Ltd
Priority date: 2018-09-21
Filing date: 2018-09-21
Publication date: 2021-01-01
Anticipated expiration: 2038-09-21
Also published as: CN109348323A

Abstract

The invention relates to a microphone structure, which comprises a peripheral shell, a bottom plate and a cavity partition plate, wherein the peripheral shell and the bottom plate jointly form a first cavity, and the cavity partition plate is used for dividing the first cavity into a first external sound cavity and a second external sound cavity. Through above-mentioned microphone structure, can realize the discernment of sound source direction at the radio reception end to can record the sound source of many routes, and sound itself has the sense of direction, so then do not need the debugging of later stage speaker, can obtain stereophonic technological effect.

Description

Microphone structure

Technical Field

The invention relates to the technical field of electronic products, in particular to a microphone structure.

Background

At present, along with the continuous development of terminal intelligent equipment, the entertainment audio and video functions are more and more, and the requirement of a user on the stereo effect of a terminal is higher and higher. The method for realizing stereo by the intelligent terminal is to set different loudspeakers at different positions of the terminal, debug the sound played by each loudspeaker, and further obtain a stereo effect.

Disclosure of Invention

The invention aims to provide a microphone structure, which solves the problem that the stereo effect can only be obtained by debugging a loudspeaker in the prior art.

The technical scheme adopted by the invention for solving the technical problem is as follows: the utility model provides a microphone structure, microphone structure includes peripheral casing and bottom plate, peripheral casing and bottom plate constitute first cavity jointly, microphone structure still includes the cavity baffle, the cavity baffle is used for with first cavity is cut apart into first outer sound chamber and second outer sound chamber.

Optionally, the first external sound cavity and the second external sound cavity are completely symmetrical with respect to the cavity partition plate.

Optionally, a first inner sound cavity and a second inner sound cavity are respectively arranged in the first outer sound cavity and the second outer sound cavity, and the first inner sound cavity and the second inner sound cavity are completely symmetrical with respect to the cavity partition plate.

Optionally, the first outer sound cavity, the second outer sound cavity, the first inner sound cavity, and the second inner sound cavity all include the bottom plate.

Optionally, the first internal sound cavity and the second internal sound cavity are provided with cavity covers relative to the bottom plate.

Optionally, the cavity cover includes a first diaphragm and a first back electrode, and the first back electrode is close to the bottom plate relative to the first diaphragm.

Optionally, the first internal sound cavity is provided with a first sound inlet hole at the bottom plate, and the second internal sound cavity is provided with a second sound inlet hole at the bottom plate.

Optionally, the first sound inlet hole and the second sound inlet hole are completely symmetrical with respect to the cavity spacer.

Optionally, the cavity spacer includes a second diaphragm and a second back electrode.

Optionally, the second diaphragm is close to the first external sound cavity, and the second back pole is close to the second external sound cavity.

Through above-mentioned microphone structure, can realize the discernment of sound source direction at the radio reception end to can record the sound source of many routes, and sound itself has the sense of direction, so then do not need the debugging of later stage speaker, can obtain stereophonic technological effect.

Drawings

FIG. 1 is a schematic diagram of a microphone structure according to the present invention;

fig. 2 is a schematic diagram of the microphone structure of the present invention.

Detailed Description

The microphone structure of the present invention will be further described with reference to the accompanying drawings and embodiments:

it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention relates to a microphone structure, which is applied to an intelligent terminal, taking fig. 1 as an example, wherein the intelligent terminal is a mobile terminal 10, and the microphone structure 11 is positioned at the lower end of the mobile terminal 10 and is arranged symmetrically with a loudspeaker structure 12 at the upper end of the mobile terminal 10.

Fig. 2 is a schematic diagram of a microphone structure according to the present invention. The microphone structure comprises a peripheral shell 1 and a bottom plate 2, the peripheral shell 1 and the bottom plate 2 jointly form a first cavity 3, a cavity partition plate 4 is further arranged in the middle of the first cavity 3, and the cavity partition plate 4 is used for dividing the first cavity 3 into two completely symmetrical and same external sound cavities, namely a first external sound cavity 31 and a second external sound cavity 32.

In the present embodiment, the first external sound cavity 31 and the second external sound cavity 32 are respectively provided with a first internal sound cavity 33 and a second internal sound cavity 34, and the first internal sound cavity 33 and the second internal sound cavity 34 are completely symmetrical with respect to the cavity partition 4. The first external sound cavity 31, the second external sound cavity 32, the first internal sound cavity 33 and the second internal sound cavity 34 are all disposed on the bottom plate 2, that is, the bottom plate 2 is included.

Specifically, the first internal sound cavity 33 and the second internal sound cavity 34 are each provided with a cavity cover 5 with respect to the bottom plate 2 thereof, wherein the cavity cover 5 includes a first diaphragm 51 and a first back electrode 52, and the first back electrode 52 is close to the bottom plate 2 with respect to the first diaphragm 51. In addition, the first internal sound cavity 33 is provided with a first sound inlet hole 6 on the bottom plate 2, the second internal sound cavity 34 is provided with a second sound inlet hole 7 on the bottom plate 2, and the first sound inlet hole 6 and the second sound inlet hole 7 are respectively opposite to the cavity covers 5 of the first internal sound cavity 33 and the second internal sound cavity 34 and are completely symmetrical relative to the cavity partition plate 4.

In this embodiment, the cavity spacer 4 includes a second back electrode 41 and a second diaphragm 42, where the second diaphragm 42 is close to the first external sound cavity 31, and the second back electrode 41 is close to the second external sound cavity 32.

In the microphone structure, the positions of the first sound inlet hole 6 and the second sound inlet hole 7 are different from the distance of a sound source, so that the collected sound pressure levels are different. If the first sound inlet hole 6 is closer to the sound source than the second sound inlet hole 7 and the sound pressure collected by the first sound inlet hole 6 is greater than the sound pressure collected by the second sound inlet hole 7, the degree of decrease of the first diaphragm 51 of the first internal sound cavity 33 is greater than that of the first diaphragm 51 of the second internal sound cavity 34, and the electrical signal collected by the first back electrode 52 of the first internal sound cavity 33 is greater than that collected by the first back electrode 52 of the second internal sound cavity 34. In addition, since the collected sound pressure of the first sound inlet hole 6 is greater than that of the second sound inlet hole 7, that is, the sound pressure obtained by the first external sound cavity 31 is greater than that of the second external sound cavity 32, the second diaphragm 42 of the cavity spacer 4 between the first external sound cavity and the second external sound cavity approaches to the second back electrode 41, and negative charges are generated. Similarly, if the sound source position is opposite to the above position, the sound pressure collected by the first sound inlet hole 6 is greater than that of the second sound inlet hole 7, the electric signal collected by the first back pole 52 of the first internal sound cavity 33 is smaller than that collected by the first back pole 52 of the second internal sound cavity 34, and the second diaphragm 42 is moved away from the second back pole 41, generating a positive charge. Thus, the sound source direction can be confirmed by comparing the obtained electric signals.

By implementing the scheme, after the microphone identifies the direction of the sound source, two paths or multiple paths of different sounds can be recorded, namely, the stereo effect can be obtained from the sound source without debugging through a later-stage loudspeaker.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A microphone structure is characterized by comprising a peripheral shell, a bottom plate, a cavity partition plate and a microphone structure, wherein the peripheral shell and the bottom plate jointly form a first cavity;

a first inner sound cavity and a second inner sound cavity are respectively arranged in the first outer sound cavity and the second outer sound cavity, and the first inner sound cavity and the second inner sound cavity are completely symmetrical relative to the cavity partition plate;

the first external sound cavity, the second external sound cavity, the first internal sound cavity and the second internal sound cavity comprise the bottom plate;

the first inner sound cavity is provided with a first sound inlet hole at the bottom plate, and the second inner sound cavity is provided with a second sound inlet hole at the bottom plate;

the first inner sound cavity and the second inner sound cavity are provided with cavity covers relative to the bottom plate;

the cavity cover comprises a first diaphragm and a first back pole, and the first back pole is close to the bottom plate relative to the first diaphragm;

the first sound inlet hole and the second sound inlet hole are located at different positions and different distances from a sound source, the collected sound pressure level is different, the electric signal collected by the first back pole of the first inner sound cavity is compared with the electric signal collected by the first back pole of the second inner sound cavity, and the direction of the sound source is confirmed.

2. The microphone structure of claim 1 wherein the first and second external acoustic chambers are completely symmetrical about the chamber divider.

3. The microphone structure of claim 1 wherein the first and second sound inlet holes are completely symmetrical with respect to the cavity spacer.

4. The microphone structure of claim 1 wherein the second diaphragm is proximate to a first external acoustic cavity and the second back pole is proximate to the second external acoustic cavity.