Shenzhen Ma Teng Audio Technology Co., Ltd.

News

The perfect sound system with supreme attentive service has been recognized by a wide range of users

Home  -  News  -  Industry News

Acoustic sound sensor

source:Industry News release time:2022-10-20 Hits:     Popular:Brand bar audio wholesale

  XD18C Big sound bar Merchant

  The sound sensor has a capacitive electret microphone sensitive to sound. The sound wave vibrates the electret film in the microphone, resulting in the change of capacitance, and the corresponding change of tiny voltage, so as to realize the conversion of optical signal to electrical signal.

  Sound sensor built-in a sound sensitive capacitive electret microphone, electret face and back electrode opposite, there is a small air gap in the middle, forming an air gap and electret as insulation medium, with the back electrode and the electret on the metal layer as two electrodes to form a flat capacitor. There are output electrodes between the two poles of the capacitor. Because of the free charge distributed on the electret film. When acoustic wave causes the displacement of electret film due to vibration; The distance between the two polar plates of the capacitor is changed, thus causing the capacity of the capacitor to change. Since the charge number on the electret is always constant, according to the formula:

  Q =CU

  Therefore, when C changes, it will inevitably cause the change of the voltage U at both ends of the capacitor, so as to output electrical signals and realize the transformation from sound signals to electrical signals.

  Specifically, the total charge of the electret is unchanged. When the electrode recede under acoustic pressure, the capacitance decreases, and the voltage between the capacitor poles will increase inversely; otherwise, when the capacitance increases, the voltage between the capacitor poles will decrease inversely. Finally, the voltage at both ends of the capacitor is removed by a very high impedance field effect, and the voltage corresponding to the sound can be amplified at the same time. Because THE FIELD EFFECT tube (FET) is an active device, it needs a certain bias and current to work in the amplified state, so the electret microphone needs a DC bias to work.


Read recommendations:

Resolution 2 School audio company

AX 88KTV audio sales

Minibass 212 Bar bar sound Merchant

The difference between a woofer and a tweeter

Hohhot ID-X CLUB high-end audio is provided by Ma Teng Audio

Previous:Guangdong·Zhuhai·WildCat FUNKTIONONE Zhuhai's first EVO system Back to list Next:Chongqing T61 bar special audio--Mateng Audio

Popular recommendation

Resolution 2 S8KTV audio Vendor

2021-07-17

EV O7T Speaker bar Vendor

2021-07-16

F1201 School audio Vendor

2021-07-16

Resolution 5S skeletal Concert sound Vendor

2021-07-16

D80DSP Large bar sound Vendor

2021-07-26

MST 10Sound bar sales

2021-07-17

Resolution 1.5TT Marten Audio company

2021-07-16

A28 CARDIOID SUBWOOFER Learning audio Merchant

2021-07-26

Resolution 2 School audio company

2021-07-15

F221 Marten Audio Merchant

2021-07-14

F81 Bar speaker company

2021-07-16

Resolution 1.5 ktv bar sound Vendor

2021-07-16

The working principle of speaker speakers.Domestic bar audio Vendor

2021-12-14

What elements do professional audio equipment need?

2022-05-09

Hohhot ID-X CLUB bar sound engineering is provided by Ma Teng Audio

2022-02-14

Line array sound effects applied to the sound field of the stage

2021-10-12

Empfehlung für Bar-Audio Finnland AURA AUDIO China Entertainment General Agent Mateng Audio Company

2021-12-15

Dongguan PARTY MASTER (original century) bar special audio---Mateng Audio

2022-08-01

The factors of entertainment sound system are summarized.Harbin Bar Speaker Factory

2021-12-28

The secret of health and longevity when using professional audio.Hangzhou Bar Audio Processing

2021-12-27

How does an audio processor render good results?

2022-06-28

What are the reasons that affect the sound of audio equipment?Guizhou Conference Room Audio

2022-06-07

Teach you how to maintain daily KTV sound system

2022-03-07

The details that professional audio equipment needs to master.Bar performance sound Vendor

2021-11-18