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How to deal with intermittent sound and noise in the use of wireless microphones

Author:admin   AddTime:2021-07-13

The main reasons for the interruption and noise in the use of wireless microphones:

When the antenna is receiving, in addition to the direct wave of the transmitted signal, it also receives the indirect wave reflected by the surrounding environment. When the two phases are opposite, the signal strength will cancel each other out, and the signal strength on the day of the online signal will be low. At the mute operation point of the receiver, the phenomenon of so-called "receiving blind spots" occurs, so the output of the receiver will appear short-lived or noisy. When the signal strength is closer to the mute operation point, the noise will be greater.



The principle of receiving and the effect of improving the interruption:
Reception uses two tuners with identical specifications and antennas connected to different locations to receive the signal from the same wireless microphone transmitter. Using a fast comparator and switching circuit, it automatically selects the antenna signal output without "dead spots". Using this dual-antenna and dual-tuner receiving method, when the signal is weak and long-distance reception, the probability of interruption can be improved by about five times higher than that of a single antenna. If the signal strength is increased by about three times (10dB), then It can be improved by about forty-five times or more, and if it is used at a general close distance, there will be almost no intermittent sound. The higher the sensitivity of the receiver, in addition to the longer the receiving distance, the fewer the number of interruptions, and the lower the noise that appears when the signal is weak to close to the mute operation point.

To ensure the perfect sound quality of the wireless microphone!
Generally, manufacturers of wireless microphones use simple single-antenna receiving circuits to reduce manufacturing costs and sell them at low prices in the market. This kind of receiver can not avoid the trouble of sound interruption and noise deterioration in places with more complicated environments or far-reaching reception! Therefore, in places where singing sound effects and professional audio are emphasized, in order to ensure perfect sound quality.

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