Sound focusing voice pickup device

Abstract

The invention discloses a sound focusing voice pickup device, comprising a concave surface reflector with increased radian from the bottom to the top and increased vertical distance between the cambered surface and the center line, a fixing shelf is arranged at the centre of the bottom of the concave surface reflector; the fixing shelf comprises a support rod connected to the concave surface reflector at one end and connected with an array microphone at the other end; the array microphone comprises a PCB board, which sleeves a guard circle, and the guard circle is connected to the fixing shelf, the PCB board is welded with a plurality of MEMS microphones at the side facing the bottom of the concave surface reflector, the PCB board connects a wire, which is connected with DSP signal processing module while penetrating the bottom of the concave surface reflector. The reflective sound wave is enhanced at one focal point and the output sensitivity is raised; the MEMS microphones have good repeatability and consistency and resist humid environment and temperature shock; the microphone array signal can support the work for the speech recognition, speech enhancement and speech separation modules.

Description

technical field [0001] The invention relates to the field of sound pickup devices, in particular to an acoustic focusing sound pickup device. Background technique [0002] The sound pickup device is an electronic product used to collect external sounds, and has been widely used in daily life, for example, communication equipment, recording equipment, etc. [0003] At present, commonly used sound pickup devices use the acoustic interference phenomenon to collect sound. When the sound comes from the direction of the long tube aligned with the sound pickup device, the difference in distance between each sound inlet hole and the diaphragm is used to form phase interference. The directional effect depends on the interference. the length of the tube. In the above sound pickup process, there are the following disadvantages when collecting sound in the far field: [0004] 1. The sound collection distance is short and the angle is wide, and the requirements for the acoustic structu...

AI Technical Summary

Problems solved by technology

[0004] 1. The sound collection distance is short and the angle is wide, and the requirements for the acoustic structure are very strict;

[0005] 2. It needs to be driven into the sound hole, which is affected by the ambient temperature and humidity and cannot be used in harsh environments;

[0006] 3. It is impossible to form a directional microphone array on a single unit

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