The infrared wireless microphone uses infrared light as the carrier of the sound signal to realize the wireless sound reinforcement system of transmitting and receiving. The basic principle is similar to that of ordinary radio frequency systems, and the process of modulation and demodulation of sound signals is also required in the process of wireless transmission and reception. However, the carrier wave of the infrared wireless microphone is infrared light, and its frequency is much higher than that of the ordinary wireless system. The infrared wireless microphone module determines that the frequency of ordinary wireless microphones is 200-900MHz, which is commonly referred to as radio frequency (the frequency band selected for radio stations, TV stations, and wireless communications); the frequency of infrared wireless microphones is above 3G, and the frequency environment is clean, and there are few Equipment radiates interfering waves.

Although infrared light is invisible, it has all the characteristics of light waves: straight line propagation, very strong reflection performance; very weak diffraction ability and penetrating power. When the infrared wireless microphone works, it needs to have a basic reflective surface, otherwise the signal receiving window will not be able to receive the signal. Therefore, the infrared wireless microphone is not suitable for use in an open environment (such as outdoors, large halls, etc.), but it will have a good effect in a relatively closed environment (such as classrooms, KTV rooms, small conference rooms) .

Will infrared wireless microphones interfere with each other? Infrared rays are transmitted in a straight line, so the infrared wireless microphones in each relatively independent space will not interfere with each other. However, if the infrared wireless microphones with the same frequency are placed in the same space, they will not work properly due to mutual interference. Infrared wireless microphone generally has two independent distinguishing frequencies, namely A and B channels (there are obvious distinctions at the transmitting end). Two or more A channels; two or more B channel signals.