The noise reduction method is as follows:
1, improve the "signal". Whether it's a random microphone or a microphone like rode plugged into a hot shoe, it's too far from the best pickup position! Everyone has seen the footage of film and television drama shooting, and the best place to take it is basically above the actor's head, about 30cm away from the actor's head.
2. Control "noise". Of course, shooting on the roadside is noisier than shooting indoors. This should be taken into account when choosing scenes or even writing scripts. Therefore, large films will close roads, and small films will choose the time when there is little traffic (except for the script specifically aimed at traffic noise).
3, the circuit noise is low, and the quality of recording equipment is improved. The electrical signal collected by mic is very weak, so it needs to be amplified first, which is often called voice playback. Voice playback is the first processing of voice incoming, so the quality of voice playback is particularly important.