CN210016632U

CN210016632U - Acoustic assembly with independent sound cavity and microphone core

Info

Publication number: CN210016632U
Application number: CN201921284837.8U
Authority: CN
Inventors: 张振; 王玉峰; 黄葛玲
Original assignee: Shenzhen Bajin Technology Co Ltd
Current assignee: Sichuan Chuansheng Technology Co ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-02-04
Anticipated expiration: 2029-08-08

Abstract

The utility model discloses an acoustic assembly with an independent sound cavity and a microphone core, which comprises a unidirectional electret microphone core with a first rear sound hole and a sound cavity for mounting the microphone core; the sound cavity is integrally formed, the upper end of the sound cavity is provided with a front sound hole, the middle of the sound cavity is provided with a second rear sound hole, and the lower end of the sound cavity is provided with a rear cavity. The utility model has the advantages that: the microphone core and the sound cavity are two independent bodies which are respectively designed and can be jointly combined and arranged in the remote controller; compared with the prior art that a remote controller is used as a sound cavity, the acoustic assembly is simple and convenient to assemble; meanwhile, the voice acquisition system can meet low noise and high definition voice acquisition, and can also realize the wide frequency response, high sampling, large dynamic and squeaking prevention required in the process of singing K.

Description

Acoustic assembly with independent sound cavity and microphone core

Technical Field

The utility model relates to an acoustics subassembly technical field, in particular to acoustics subassembly with independent sound chamber and miaow core.

Background

The microphone core is also called a microphone head, a microphone, a mike and a microphone. It is an energy conversion device which converts sound signals into electric signals, and is a device opposite to a loudspeaker. The microphone is an input and the loudspeaker is an output.

In the last 70 th century, research and development of electrets were carried out by scientific research institutes in China. In the last 80 th century, a single-direction electret microphone is widely applied to a conference system, and because the distance between two adjacent persons is narrow when a meeting is started, the independent sound receiving effect of two adjacent microphones cannot be solved by using a full-direction microphone, the single-direction microphone is adopted and is used up to now all the time, through the development of nearly 40 years, the conference system is greatly improved and enhanced in the aspect of rear-end sound output, but the structure of a front-end microphone core is almost as designed as a cavity structure except that the appearance is different.

The singing remote controller of K on the existing market, the miaow core that adopts generally is two kinds: (1) the fully-directional condenser microphone or silicon microphone is adopted, the sensitivity is high, the voice can be clear, the microphone is suitable for voice recognition control but not suitable for K singing, the noise is high during K singing, the frequency response is narrow, the microphone is serious in microphone spraying, and self-excited squeaking is easy to realize. (2) At present, the sampling rate of a voice remote controller is generally 16K, and the voice remote controller is suitable for voice recognition, but the voice of a user is relatively thin during K singing, the voice quality details of the user cannot be reflected, and the voice quality of recording and real-time answering is relatively poor.

At present, the microphone core of the K song of the remote controller utilizes the self structural space of the remote controller to be a sound cavity, an independent sound cavity design is not provided, the acoustic performance is not guaranteed, and the K song is not well installed structurally.

Disclosure of Invention

In order to overcome the defects of the whole or part of the technology, the utility model provides an acoustic assembly with an independent sound cavity and a microphone core, which is realized by the following technical scheme.

An acoustic assembly having a separate sound cavity and a microphone core, comprising a unidirectional electret microphone core with a first rear sound aperture, a sound cavity for mounting the microphone core; the sound cavity is integrally formed, the upper end of the sound cavity is provided with a front sound hole, the middle of the sound cavity is provided with a second rear sound hole, and the lower end of the sound cavity is provided with a rear cavity.

Furthermore, the sound cavity and the microphone core are of circular cylinder structures, and the microphone core is arranged between the front sound hole of the sound cavity and the second rear sound hole.

Furthermore, a groove is formed in the outer surface of the rear cavity of the sound cavity.

Furthermore, the upper end of the sound cavity is connected with a cover plate in a clamping manner.

The utility model has the advantages that: the microphone core and the sound cavity are two independent bodies which are respectively designed and can be jointly combined and arranged in the remote controller; compared with the prior art that a remote controller is used as a sound cavity, the acoustic assembly is simple and convenient to assemble; meanwhile, the voice acquisition system can meet low noise and high definition voice acquisition, and can also realize the wide frequency response, high sampling, large dynamic and squeaking prevention required in the process of singing K.

Drawings

Fig. 1 is a schematic view of the sound cavity structure of the present invention.

Fig. 2 is a schematic diagram of the side structure of the sound cavity of the present invention.

Fig. 3 is a schematic view of the structure of the tooth core of the present invention.

Fig. 4 is a static schematic of an electret microphone core.

Fig. 5 is a schematic view of electret microphone core dynamics.

Wherein:

1-a sound cavity; 11-front sound hole; 12-second rear sound entry; 13-the posterior chamber; 14-a groove;

2-miami core; 21-first rear sound inlet;

3-a metal layer;

4-polyester film;

5-an electret;

6-copper plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 3, an acoustic assembly having an independent sound chamber 1 and a microphone core 2 includes the independently constructed sound chamber 1 and microphone core 2, wherein, as shown in fig. 1 to 2, the sound chamber 1 is integrally formed, a front sound hole 11 is provided at an upper end, a second rear sound hole 12 is provided at a middle portion, and a rear chamber 13 is provided at a lower end. The second rear sound inlet 12 is the special structural requirement of the unidirectional electret microphone core and cannot be blocked; the back cavity is an important guarantee for the frequency response curve of the product, and particularly has a large influence on the high-frequency curve of the product. As shown in fig. 3, the microphone core 2 is a unidirectional electret microphone core with a first rear sound-receiving hole 21. The second rear sound entrance 12 is fitted to the microphone core 2, and the first rear sound entrance 11 is not blocked. The upper end of the sound cavity 1 is connected with a cover plate (not shown in the drawing) in a clamping way.

In the specific embodiment, the sound cavity 1 and the microphone core 2 are circular cylindrical structures, and the microphone core 2 is arranged between the front sound inlet hole 11 and the second rear sound inlet hole 12 of the sound cavity 1. It is easy to think that the rectangular structure and the square structure arranged in the remote controller can also meet the requirement.

To further increase the mounting rapidity of the acoustic assembly, the outer surface of the rear cavity 13 of the sound cavity 1 is provided with a groove 14. Corresponding bosses can be arranged in the remote controller so as to achieve the quick installation of the acoustic assembly.

The utility model discloses an independent sound cavity design, miaow core 2 is installed in sound cavity 1, and the electroacoustic can both obtain the guarantee, and the acoustics subassembly can constitute K song remote controller product with other parts of remote controller as an solitary device, and the installation is reliable simple.

The working principle of the unidirectional electret microphone core is shown in fig. 4 and 5, the electret 5 is a solid dielectric with persistent polarization, in a specific embodiment, one pole adopts a polyester film 4 and a metal layer 3, and the other pole adopts an electret 5 and a copper plate 6, wherein the polyester film 4 is a PET film with the thickness of 0.002mm, and the effect of reducing the human voice is better; the electret material is a FEP film with the thickness of 0.012mm, the film can carry out electret charge, and the FEP film and the copper plate are pressed at high temperature, so that the product is convenient to assemble.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An acoustic assembly having a separate sound cavity and a microphone core, comprising a unidirectional electret microphone core with a first rear sound aperture, a sound cavity for mounting the microphone core; the sound cavity is integrally formed, the upper end of the sound cavity is provided with a front sound hole, the middle of the sound cavity is provided with a second rear sound hole, and the lower end of the sound cavity is provided with a rear cavity.

2. An acoustic assembly in accordance with claim 1, wherein the acoustic chamber and the core are of a circular cylindrical structure, and the core is installed between the front sound hole and the second rear sound hole of the acoustic chamber.

3. An acoustic assembly with a separate cavity and microphone core as claimed in claim 1 or 2 wherein the outer surface of the back cavity of the cavity is provided with a recess.

4. An acoustic assembly in accordance with claim 3, wherein the acoustic chamber has a cover snap-fit over the upper end of the acoustic chamber.