Introduction to condenser microphones

Microphone specifications:
Electret method The low frequency response of the back electrode is better and more stable, but the cost is higher.
Size Small size is not easy to make high sensitivity. The thinner the more expensive.
Directivity Consumer products can be omnidirectional, and there are special needs to discuss design issues with engineering staff.
Contact methods are divided into three types: welding wire, DIP, contact type (spring, spring PIN).
The Rubber Holder can block the sound of friction from the inside of the machine or human hands.
There are two methods of labeling sensitivity, which can be selected according to the design of the circuit and mechanism.
FAQ Frequently Asked Questions
Echo / Buzzing When the microphone is too close to the speaker or the angle is relatively tolerant
Noise The microphone should be far away from the antenna, speakers, etc., the parts that will send signals, the cleaner the power, the less noise.
Sound guide tube vs. sound chamber size Due to the ID problem, the installation position of the microphone often cannot be close to the surface of the cabinet. Loudness (distortion).
Need to know the directivity Need to pay attention to the problem of air vents in the back, the closer to the front sound hole, the more straight the angle, the better the directivity effect.
Electrostatic FETs are easily broken by static electricity.Therefore, you must take measures to prevent static electricity during processing and transportation.
Ferrochrome temperature The temperature of ferrochrome is too high, and the welding is too long, which may damage the microphone.