Each wireless microphone has its own effective Angle. In general, the sound source should be aligned with the center line of the wireless microphone. The greater the deviation Angle between the two, the greater the treble loss. Sometimes when a wireless microphone is used, it makes a "rumbling" sound. At this point, it can be reduced by deflecting it at an Angle. When amplifying, the wireless microphone should not be close to the speaker or aimed at the speaker, otherwise it will cause whistling. The height of the wireless microphone should be determined according to the height of the sound source. If one person is speaking or several people are singing, the height of the wireless microphone should be consistent with the singer's mouth; When the number of people is large, the wireless microphone should be placed at the average height, and the position of the singer, accompaniment and various instruments in the team should be appropriately allocated, so that the sound is not too loud or too light, and all sounds should be within the effective Angle of the wireless microphone. The wireless microphone should be prevented from knocking or dropping during use. The microphone should not be tested by blowing or tapping, otherwise the wireless microphone can easily be damaged. When wireless microphones are used or recorded outdoors, a wind shield should be used to avoid the "bang" sound of recording wind. The windshield also protects the wireless microphone from dust.

Wireless microphones, such as the EK-88, are battery powered. If the voltage drops, the sensitivity will decrease and the distortion will increase. Therefore, when the sound deteriorates, check the battery voltage, turn off the power switch when the wireless microphone is not in use, and remove the battery when it is not in use for a long time. In general, most receivers have a squelch control function. When the power is turned on and there is no microphone signal input or the signal strength is below a certain signal-to-noise ratio, the mute control circuit will turn off the output circuit and the main connector will be completely mute to prevent noise output. When the microphone signal is turned on, the receiver immediately turns off the mute circuit and opens the output circuit, allowing the audio circuit to output the sound of the microphone. However, when the microphone power is turned on and off, or when the microphone signal is turned off, when the signal interference beyond the mute control strength is occasionally encountered, the receiver mute circuit will also be activated by shock noise and interference noise to output large noise. In order to solve this problem, the so-called "audio lock mute circuit" is added to the model to control it, the principle is to add a fixed ultrasonic frequency modulation signal to the microphone transmission signal; At the same time, the discriminator is also installed inside the connector. In this way, the receiver receives a microphone signal containing the fixed ultrasonic frequency modulated signal before starting the output circuit to prevent interference from other signals or noise. To protect your precious audio system from noise damage, you choose a model with a voice code lock mute feature.

The technical bottleneck in the use of wireless microphone is signal interference. In particular, the more frequencies used, the more serious the interference problem. Therefore, when multiple wireless microphones are used in the same place at the same time, interference should be avoided. In addition to carefully selecting frequencies that physically do not interfere with each other and avoiding interference from adjacent external signals, the receiver should also have good selectivity, and the emitted and received radiation harmonics should be filtered very cleanly to avoid mutual interference of signals. Typically, VHF receivers can use 12 frequencies at the same time, which is very good. Taiwan's MIPRO products can use 24 frequencies at the same time, without interference. Even under certain conditions, with special design and arrangement, more frequencies can be used at the same time. To solve the problem of using multiple channels at the same time and avoid interference, a multi-channel series model with digital locking should be selected, which can change the frequency:

The traditional wireless microphone system uses a quartz locked fixed frequency design. The model can not arbitrarily change the required frequency when multi-channel use is required or strong signal interference is encountered, but replace the whole set. To solve this problem, the model adopts a PLL synthesis method, which allows users to change dozens of frequencies in the transmitter and receiver at will. Although this advanced design costs more, it provides very convenient features for dealers and users to solve the above problems.