A directional microphone and a sound acquisition device

Abstract

A directional microphone and sound acquisition device. The directional microphone includes a first circuit board, a second circuit board and a MEMS chip, The MEMS chip comprises a MEMS diaphragm, a first side surface of the MEMS chip is bonded with a first side surface of the first circuit board, a second side surface of the MEMS chip is bonded with a first side surface of the second circuit board, and acoustic holes are arranged at positions corresponding to the MEMS chip on the first circuit board and the second circuit board. The present application is capable of generating a sound path difference when an external sound reaches a MEMS diaphragm through an acoustic through hole of a first circuit board and through an acoustic through hole of a second circuit board, The directional microphone is composed of a first circuit board, a MEMS chip and a second circuit board. Compared with the directional ECM in the prior art, the directional ECM has the advantages of high consistency, simple structure and small size, and is favorable for improving product performance and miniaturization development of audio equipment.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of electronic devices, in particular to a directional microphone and sound collection equipment. Background technique [0002] With the development of science and technology and the improvement of people's living standards, microphones are more and more widely used in people's lives, and gradually become a necessity in people's lives. A microphone is an energy conversion device that converts acoustic signals into electrical signals, and it is a common tool for long-distance conversations. [0003] Since the propagation of sound is non-directional, the microphone can receive sounds from sources in multiple directions. However, if the microphone receives sounds from multiple sources, it cannot guarantee the sound quality of the target sound in a certain direction. Therefore, in order to improve the sound quality in a specific direction To improve the sound quality of the transmitted soun...

AI Technical Summary

Problems solved by technology

[0003] Since the propagation of sound is non-directional, the microphone can receive sounds from sources in multiple directions. However, if the microphone receives sounds from multiple sources, it cannot guarantee the sound quality of the target sound in a certain direction. Therefore, in order to improve the sound quality in a specific direction The sound quality of the transmitted sound, the directional microphone came into being

[0004] At present, the commonly used directional microphone is an electret condenser microphone (ECM microphone), but due to the poor consistency of the directional ECM microphone, it is composed of a damping layer, a cavity, a diaphragm, a substrate, a PCB board and a metal mesh layer. , making it complex in structure and large in size, affecting product performance and not conducive to the miniaturization of audio equipment

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