Many people want to know the working principle of noise reduction microphones for mobile phones from microphone noise reduction chip suppliers. In fact, it is very simple. Different microphone noise reduction chip suppliers have their own different noise reduction algorithms, but the basic principle of call noise reduction is the same. This technology is called dual microphone noise reduction technology, which is built into the mobile phone. Two microphones, one maintains a clear call, and the other actively eliminates noise physically. By collecting external noise, the microphone noise reduction chip supplier uses internal algorithms to process it and emits a sound wave opposite to the noise, using the principle of cancellation to eliminate noise .
It should be noted that the two microphones of the microphone noise reduction chip supplier must keep a certain distance and be isolated on the internal motherboard. The main microphone should be close to where people are talking. When the mobile phone makes a normal call, the main microphone collects the voice and background noise during the call to generate a louder signal. At the same time, the microphone noise reduction chip supplier's noise reduction microphone will also collect smaller sounds and background noise to generate another volume signal. The two signals are input to the noise reduction processor, and the input ends of the two signals are differential amplifiers, that is, the external noise collected by the two signals is cancelled and amplified to obtain the signal.
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Shenzhen Shuyin Technology Co., Ltd. is a high-tech enterprise integrating microphone, microphone, Bluetooth headset, electronic audio-visual products and peripheral accessories of electronic digital products into one.
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