新闻中心

NEWS CENTER

>
Audio accessories wireless microphone related technical terms

Audio accessories wireless microphone related technical terms

Page view
First, squelch
The receiver of the audio accessory wireless microphone will automatically cut off the output signal when it does not receive the signal or the signal is weak. This function is called squelch. If there is no squelch function, or the squelch function is poor, noise will be emitted from the speaker speaker. Noise can affect the sound quality, destroy the atmosphere and even damage the sound reinforcement equipment.
 
Second, the dead point
Also known as the dead zone. Audio accessories Wireless microphones During the movement, the signals received by the receiver will change strongly depending on the distance, relative position or obstacle blocking. At some locations within the normal range of use, a weak signal will cause the squelch circuit in the receiver to actuate and cut off the output signal; and after leaving the position, it will be able to receive and output normally. This location is called a dead or dead zone.
 
Third, diversity reception
The audio accessory wireless microphone receiver can receive the signals of the same wireless microphone from two antennas, and select a stronger one signal through the internal circuit. This method can greatly eliminate the receiving dead zone, avoiding dumb sound or generating dead point noise. There are two other ways to receive diversity: antenna diversity and mid-range diversity.
In the antenna diversity mode, there are two receiving antennas, a set of control circuits and a set of receiving circuits. When the receiving signal is weak during operation, the control circuit automatically switches to use another antenna.
In the middle-distribution diversity mode, in addition to two antennas and one control circuit, there are two complete receiving circuits, which work at the same time, and are switched by the control circuit to output a better audio signal. In this way, since the strong signal is tracked at any time, the effect is better than the former method, but the circuit is complicated and the cost is high. This type of diversity is often referred to as double tuning, true diversity, and the like.
 
Four, multiple channels
The general audio accessories wireless microphone, its carrier frequency is fixed, the user can not be changed during use. S