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A switchable silicon microphone

A silicon microphone and sound hole technology, applied in the field of microphones, can solve the problems that silicon microphones cannot be switched and increase costs, and achieve the effects of ensuring electrical performance, improving the ability to resist blowing, and improving reliability

Active Publication Date: 2022-05-10
重庆黄葛树智能传感器研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the existing silicon microphones cannot be switched. When omnidirectional microphones, bidirectional microphones or unidirectional microphones are required at the same venue, the microphones must be replaced, which will increase costs.

Method used

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  • A switchable silicon microphone
  • A switchable silicon microphone
  • A switchable silicon microphone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Such as Figure 1-4 As shown, a switchable silicon microphone includes a circuit board 1, a first housing 2 and a second housing 3, the first housing 2 is mounted on the circuit board 1 and forms an accommodating cavity 21, and the second housing 3 is installed on the circuit board 1 to form a sound cavity 31, and the second housing 3 is located in the accommodation cavity 21, and the sound cavity 31 is provided with a MEMS chip mounted on the circuit board 1 12 and IC chip 11; the first sound hole 22 is set on the side of the first shell 2, the second sound hole 34 is set on the second shell 3, and the third sound hole 34 is set on the circuit board 1 Hole 13, the MEMS chip 12 covers the third acoustic hole 13, the lower surface of the circuit board 1 is sunken upwards and provided with a chute 5, and a slider 50 is slidably connected to the chute 5, and the first Three sound holes 13 are arranged at the bottom of the chute 5 and communicate with the chute 5, the slid...

Embodiment 2

[0074] Some improvements have been made to the first embodiment above, and the improvements include that the length of the slider 50 is not less than twice the diameter of the third sound hole 13, and the slider 50 includes a full shielding part 51 and a half shielding part 52. The half-shielding part is composed of a damper 52a and a sound-permeable membrane 52b from the outside to the inside, and the areas of the full-shielding part 51 and the half-shielding part 52 are the same. Other structures remain unchanged.

[0075] In this way, when a one-way microphone is needed, slide the slider to the middle of the chute, let the half-shielding part cover the third sound hole, and cover the third sound hole with damping on the basis of the above-mentioned two-point silicon microphone, that is, enter the sound hole. The sound inlet channel in the cavity is composed of the second sound hole and the third sound hole with damping, wherein the third sound hole is used to control the in...

Embodiment 3

[0077] Such as Figure 5-10As shown, some improvements have been made to the first embodiment above, and the improvements include that the axial direction of the third sound hole 13 is inclined at a certain angle to the circuit board 1, and the bottom of the chute 4 is also opened There is a receiving groove 53, the receiving groove 53 communicates with the third sound hole 13, and the bottom of the receiving groove 53 is lower than the upper surface of the circuit board 1, the slider 50 includes a full shielding part 51 and A half shielding part 52, the half shielding part 52 can cover the third sound hole 13, the full shielding part 51 is composed of a horizontal block 51a and an inclined block 51b, the axial direction of the inclined block 51b is in line with The axial direction of the third sound hole 13 is parallel, and the length and width of the slanting block 51b match the third sound hole 13, and the slanting block 51b matches the receiving groove 53 and can be The a...

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Abstract

The present invention relates to the technical field of microphones, in particular to a switchable silicon microphone, comprising a circuit board, a first shell and a second shell, the first shell is installed on the circuit board and forms a receiving cavity, and the second shell Installed on the circuit board and form a sound cavity, and the second shell is located in the accommodation cavity, and the sound cavity is provided with a MEMS chip and an IC chip mounted on the circuit board; A first sound hole is provided on the side of a housing, a second sound hole is provided on the second housing, a third sound hole is provided on the circuit board, and the MEMS chip covers the third sound hole , the lower surface of the circuit board is recessed upwards to form a chute, a slider is slidably connected to the chute, the third sound hole is arranged at the bottom of the chute and communicates with the chute, the A slider can cover the third sound hole. The invention can change the type of the microphone, so that the microphone can be freely switched between omnidirectional, bidirectional and single-directional.

Description

technical field [0001] The invention relates to the technical field of microphones, in particular to a switchable silicon microphone. Background technique [0002] Conventional silicon microphone products include a packaging structure composed of a circuit board and a metal casing. The metal casing is provided with a sound hole for receiving external sound signals, and MEMS (Micro-Elec tro-Mechanical Systems, micro Electromechanical system) chip and IC (Integrated Circuit, integrated circuit) chip, MEMS chip can convert the sound signal incoming from the sound hole into an electrical signal, the MEMS chip is electrically connected with the IC chip on the circuit board, and the sound transformed by the MEMS chip The signal is further processed by the IC chip and connected to the external circuit through the circuit board. [0003] Existing silicon microphones fall into three basic directional categories: omnidirectional, bidirectional, and unidirectional. [0004] 1. Omnidi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R19/04H04R19/00H04R1/08
CPCH04R19/04H04R19/005H04R1/083
Inventor 刘宝玉杨建德田永超曾学忠曾伍阳赵首领申会文
Owner 重庆黄葛树智能传感器研究院有限公司