90% of the performers have stepped on these five fatal misunderstandings (part two), namely, the frequency cut, howling and noise source dismantling of the wireless microphone.

Myth 3: Howling only blames the loud volume, ignoring the underlying logic of pickup and speaker orientation.
Root of the problem
Many people will only lower the volume of the fader when they encounter howling, and treat the symptoms rather than the root cause. There are three core misunderstandings:

The microphone pickup head is opposite to the return speaker and the main amplifier, and the sound emitted by the speaker is picked up by the microphone again, forming a sound cycle amplification, which directly triggers harsh howling;
The stage does not use a professional anti-howling processor, and only relies on manpower to suppress the volume, which loses the texture of human voice;
Wearing a headset and a collar clip is too close, and the human voice is overloaded with high frequency. If it is slightly amplified, it will howl.
Typical scene
As soon as the singer approached the stage and listened to the stereo, he screamed immediately. His voice was thin and stuffy, and he dared not turn up the volume.

Radical plan
Adjust the placement angle of the listening speaker, so that the sound outlet of the speaker avoids the activity area where the performer holds the microphone;
Turn on the squeal suppression function of the equipment before the performance, and automatically attenuate the high-frequency frequency band that is easy to squeal;
When singing with a microphone, the microphone head should not be facing the speaker; Wear a headset to keep a 2-3cm face pickup distance;
The vocal channel moderately attenuates high frequencies and reduces sharp frequency feedback.

Myth 4: Power supply and line interference constantly produce current noise.
Root of the problem
90% of noise and rustle current sound come from power supply interference, not the microphone itself;

Typical scene
As soon as the light is turned on and the big screen is turned on, the microphone immediately appears continuous current noise, and the replacement of new wheat still exists.

Radical plan
Audio equipment (wireless microphone host, mixer) uses independent power supply sockets alone, and does not share circuits with lights, large screens and power amplifiers;
The audio signal line and the power line shall be routed separately, with a spacing greater than 30cm. Binding and winding are prohibited.
The performance uses a brand-new high-capacity rechargeable battery. If the power is lower than 30%, replace it in time to avoid low-voltage noise.
Choose professional audio cable with shielding layer to reduce external electromagnetic radiation interference.

Myth 5: Blind pursuit of long distance, ignoring equipment adaptation, and frequent frequency interruption in long distance.
Root of the problem
Many merchants and performance teams blindly purchase ordinary diversity wireless wheat at low prices, but they are used for outdoor weddings and large-scale stage remote scenes. The effective transmission distance of common diversity equipment is only within 30 meters, beyond which the signal is attenuated, and the frequency is directly cut off and the voice is lost. Some people install cheap extension antennas at will, and the antenna impedance does not match, which weakens the signal and aggravates the jam.

Typical scene
The wedding couple walked to the far end of the outdoor lawn, the stage singer walked to the back of the audience, and the microphone was silent directly.

Radical plan
Indoor KTV, small indoor activities: ordinary diversity microphone is enough; Outdoor Shang Yan, large-scale stage directly on the true diversity wireless microphone;
When ultra-long-distance transmission is needed, the original signal extension antenna should be matched, and the miscellaneous antenna accessories should not be mixed;
Field test the farthest moving distance in advance for outdoor performance, and reserve signal margin.