Handling method of staccato and noise in wireless microphone
1. The main notice of wireless microphone in use of stutter and noise:
When the antenna is receiving, in addition to receiving the direct wave of the transmitted signal, it will also receive the indirect wave reflected by the surrounding environment. When the two are opposite in phase, the signal strength will cancel each other out , the signal strength of the online signal on that day is lower than the mute action point of the receiver, that is, the so-called “receive dead angle” phenomenon occurs, so the output of the receiver will present a short-term staccato or noise. When the signal strength is closer to the mute action point, the The louder the noise.
2. The principle of “True-Diversity” and the function of improving staccato:
“True-Diversity” is accepted Use two tuners with completely different specifications and antennas connected at different positions to receive the signal from the same wireless microphone transmitter, and use the fast comparator and switching circuit to automatically select the antenna signal output without “dead spots”. Using this kind of dual antenna and dual tuner reception system, when the signal is weak at a distance, the probability of sound 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 more than forty-five times, and if it is used in a general close-distance environment, there will be almost no sound interruption at all. The higher the sensitivity of the receiver, in addition to the farther the receiving interval and the less the number of stutters, the lower the noise when the signal is weak and close to the mute action point.
3. To ensure the perfect sound quality of the wireless microphone, it is impossible to choose the “active selection” model!
General wireless microphone manufacturers use simple single-antenna “Non-Diversity” receiving circuits to reduce manufacturing costs and sell at low prices in the market. This kind of “non-active selection” receiver cannot avoid the trouble of staccato and noise deterioration in situations where the environment is more complicated or the receiver is farther away! Therefore, in order to ensure the perfect sound quality, for the occasions that focus on singing sound effects and professional audio, it is impossible to choose the “active selection” model! Although the model of “active selection” is more expensive, it is the only choice to meet the quality requirements of wireless microphones to avoid sound interruption and noise.
