RFQAEC Optimized Design
Communication products are usually equipped with microphones and speakers. When making a call, the microphone will receive the sound signal from the speaker and enter the system through the microphone again, causing the system to generate echoes that interfere with the call. To eliminate the system whistling sound, it is generally necessary to cooperate with the DSP to effectively eliminate it. The microphone can adopt a uni-microphone to reduce the signal from the rear speaker. The microphone must be as far from the speaker as possible, and the two should not be installed on the same plane. (Fig.7.1)
However, the combination of the speaker and the mechanism should be designed to prevent the speaker's vibration from being transmitted to the microphone, making the echo and distortion more serious. Finally, the DSP and AEC algorithms are used to calculate and eliminate the echo so that it can be attenuated to a minimum and improve the call quality (Fig.7.2).
