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  2. Noise gate - Wikipedia

    en.wikipedia.org/wiki/Noise_gate

    An Alesis Micro Gate noise gate. A noise gate or simply gate is an electronic device or software that is used to control the volume of an audio signal.Comparable to a limiter, which attenuates signals above a threshold, such as loud attacks from the start of musical notes, noise gates attenuate signals that register below the threshold. [1]

  3. Gating signal - Wikipedia

    en.wikipedia.org/wiki/Gating_signal

    For example, in live sound reinforcement, a noise gate is often employed to mute or attenuate the microphone signal when the sound level falls below a certain threshold. This helps minimize the pickup of ambient noise and unwanted signals. 3. Radar systems: Signal gating plays a crucial role in radar systems, particularly in pulse-Doppler radar ...

  4. Sound reinforcement system - Wikipedia

    en.wikipedia.org/wiki/Sound_reinforcement_system

    A noise gate mutes signals below a set threshold level. A noise gate's function is in, a sense, opposite to that of a compressor. Noise gates are useful for microphones which will pick up noise that is not relevant to the program, such as the hum of a miked electric guitar amplifier or the rustling of papers on a minister's lectern.

  5. Dynamic range compression - Wikipedia

    en.wikipedia.org/wiki/Dynamic_range_compression

    A noise gate can be thought of as an extreme form of downward expansion as the noise gate make the quiet sounds (for instance: noise) quieter or even silent, depending on the floor setting. [2] Upward expansion makes the louder sounds above the threshold even louder.

  6. Squelch - Wikipedia

    en.wikipedia.org/wiki/Squelch

    A noise squelch circuit is noise-operated and can be used in AM or FM receivers, and relies on the receiver quieting in the presence of an AM or FM carrier. To minimize the effects of voice audio on squelch operation, the audio from the receiver's detector is passed through a high-pass filter , typically passing 4,000 Hz (4kHz) and above ...

  7. Audio forensics - Wikipedia

    en.wikipedia.org/wiki/Audio_forensics

    A noise gate can help the listener understand a signal that is perceived to be less noisy because the background sound is gated off during pauses in the conversation. However, the noise gate in its simple version cannot reduce the noise level and simultaneously boost the signal when both are present at the same time and the gate is open. [2]

  8. Sound suppression system - Wikipedia

    en.wikipedia.org/wiki/Sound_Suppression_System

    Sites for launching large rockets are often equipped with a sound suppression system to absorb or deflect acoustic energy generated during a rocket launch. As engine exhaust gasses exceed the speed of sound , they collide with the ambient air and shockwaves are created, with noise levels approaching 200 db.

  9. Audio signal processing - Wikipedia

    en.wikipedia.org/wiki/Audio_signal_processing

    An analog audio signal is a continuous signal represented by an electrical voltage or current that is analogous to the sound waves in the air. Analog signal processing then involves physically altering the continuous signal by changing the voltage or current or charge via electrical circuits.