Noise gate意思

"Noise gate" is a term used in audio engineering and electronics, specifically in the context of signal processing. It refers to a device or a function that is designed to attenuate or remove unwanted noise from an audio signal.

A noise gate works by analyzing the level of the audio signal and only allowing the signal to pass through when it exceeds a certain threshold. When the signal level drops below the threshold, the noise gate closes, effectively silencing any noise that is below the level of the desired audio.

Noise gates are commonly used in live sound reinforcement, recording studios, and in audio processing equipment to reduce background noise, hiss, hum, or other unwanted sounds that may be present in the audio signal. They are particularly useful in situations where the level of the desired audio signal varies, such as with vocalists or instruments that are not being played consistently.

In the context of electronic music production and DJing, noise gates can be used to control the level of noise in electronic signals, such as those from synthesizers or drum machines, or to gate the signal from a microphone to prevent feedback or unwanted noise when the microphone is not being used.