4. Literacy
Usually, the wireless microphone used for singing has a directional sound head, so holding the microphone to stand on either side of the speaker or behind the speaker, and using the microphone is less likely to produce a feedback whistle. If you want to stand in front of the speaker, you must pay attention to the direction of the microphone and the speaker should be controlled at a certain Angle, without echo.
The position of holding the wireless microphone is more than 90 degrees in the vertical or horizontal direction and the Angle of the speaker, which can reduce the occurrence of feedback sound. The heart-oriented microphone front and the speaker are 180 degrees or the super-directional microphone front and the speaker are 120 to 140 degrees. If you do not understand the directivity of your use of the microphone, and use it in the face of the speaker, it is easy to cause large volume feedback. Since the microphone is facing the speaker is the most taboo Angle, at such an Angle, no matter the expensive microphone will easily produce a scream echo.
Five, interference with literacy
Before choosing a wireless microphone, you should understand the transmission frequency of the local TV station and stagger the purchase. If it is a new place, if conditions exist, in the process of civil construction on the roof and around the high-density wire or iron sheet, to shield and isolate the interference of external wireless signals. You can also use the SQUEICH button on the receiver to suppress interference signals (but this will affect the range of the microphone).
6. Antenna and signal literacy
When using multiple sets of the same series of wireless microphone systems, if possible, it is best to use the antenna distributor to minimize the mutual interference between the antennas on the original receiver; It can also make the microphone receiver maintain an appropriate horizontal spacing, so that there are better receiving conditions between the receivers, and avoid mutual interference between frequencies, so as to get a better wireless signal.
7. Digital literacy
When two or more handheld wireless microphones of the same model are used at the same time, in order to prevent the bottom of each wireless microphone (where the microphone is not easily blocked by the hand) from being marked with a different color, the corresponding microphone channel on the mixing table should also be marked or marked with the same color as the microphone. In this way, even if there is an error in the wireless microphone, the operator will correct it in time. In addition, it can also be marked with a color microphone dust cover, which not only improves the sound quality, but also can be used as a microphone mark, killing two birds with one stone. In order to prevent the mistake of taking the collar clip wireless microphone, you can first set the number or color of each microphone, set the person before the performance, fix the tone, and have a special person to arrange the exchange of use.
8. Wordless literacy
Performers always use hand-held wireless microphones in the performance, some players will unconsciously turn off the power of the wireless transmitter, or open the microphone mute switch, so that the microphone is in a mute state, so that the next actor will use the wireless microphone without sound embarrassing scene. In general, when the power supply of the wireless microphone transmitter is turned off, the transmitter working display light on the wireless microphone receiver will be turned off, and when the operator can view the wireless receiver indicator light at any time, the problem can be detected in time. However, if the "mute" switch of the wireless microphone is turned on, the headset will only be heard by the operator when the program is alternating. In order to prevent the silent phenomenon of wireless microphones, tape should generally be used to fix the mute switch.
Nine, the choice of battery literacy
In order to ensure the normal use of the wireless microphone system, it is necessary to use a battery with sufficient energy, and choose a 9 v alkaline battery, and its power should be confirmed before purchase and use.
Most V-segment wireless microphone receivers do not have a battery level display for the transmitter. In order to prevent the audio signal distortion caused by the lack of battery power, the operator can use the PFL pre-listening function of the mixer when the wireless microphone is in normal use, and use the headset to monitor the signal of the wireless microphone. If the signal noise of the microphone channel increases slightly, the battery will be replaced immediately.
During the concert, it is best to open the "mute" switch of the channel of the mixer, so that the wireless microphone is in a mute state, if the mixer does not have this function, you can turn off the output level of the wireless microphone, and then turn off the transmitter power, replace the battery, and then turn on the transmitter power, the receiver output flat; Alternatively, turn off the input signal with the Line/MIC selector, and reset the console input gain or select key after replacing the battery.