It is not difficult to know the causes of microphone howling, you can check and know your microphone falls into one of the following causes:
First, lack of capacity. This is the most common cause for microphones. It can happen at all types of microphones. Whether it is wired microphones or wireless microphones, high-end microphones or cheap microphones. To overcome this phenomenon, when using, you need to pay attention to the capacity of the microphone. How to ensure the microphone meets the power level for the best sound quality makes the user really comfortable to use. However, when dealing with this problem, many people make the mistake of increasing the capacity of the system together with increasing the sensitivity of the microphone. This will result in resonance resulting in unpleasant hissing.
Second, let the microphone close and towards the speaker cause negative resonance. The main sound will follow a direction of loudspeaker then from the speakers bounce the sound back to the microphone. The phenomenon of howling is also born from that.
Third, amply adjustment is not correct, incorrect, leading to howling of the microphone. This is also the reason many current amplifiers are equipped with anti-howling features to bring the best sound effect, making the user most satisfied.
Fourth, the ability of sounding room is not good is a reason that makes the microphone howling. The resonance phenomenon caused by the sound absorption ability of the singing room can be overcome by selecting the materials with good sound insulation. However, you should not abuse too many negative devices, because when there are too many sound absorption devices in the room, it will make the sound echo and reverberate. Compared to how the microphone is howling, these echoing sounds will make you equally uncomfortable.