1. Use RF filter

When EMI in the microphone signal, RF interference (RFI) is another element. If you use a microphone near cities or radio stations, RFI risks may be generated in the signal.

And some microphones are particularly sensitive to RFI. Assuming that in the studio's studio, Rode NT1-A can almost be almost influenced by RFI, and Neumann U87 AI may have uncomfortable white noise.

In order to further reduce EMI and eliminate RFI in the signal, RF filters can be used. They are usually connected to the microphone and then connected to the rear device.

2. The microphone signal of the high -pass filter

If a low -frequency buzz (from power) or rumbling sound (from the streets, footsteps, machines, etc.), you can try to use Qualcomm filter to reduce the noise in the signal.

The high -pass filter can filter out the low -frequency signals in the microphone signal and allow high -frequency signals to pass.

Signals of 100 Hz or higher frequencies Qualcomm can reduce the following low -frequency noise:

-Agenher power supply (50 or 60 Hz).

-A mechanical noise (vibration of the microphone through objects).

-The low -end rumbling sound (sound from street traffic, machines, etc.).

When the messenger signal is filtered by high -pass filtering, it must be cautious. The frequency of setting the filter too high will cause the sound to thin. When recording a high -sound sound source, this does not seem to be, but when recording low -frequency sound sources (low voice, large, bottom drum, bass, etc.), Qualcomm signal may not be a good choice.