Ecler ECLERNET MANAGER - Manual (Page 74)

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7.5.4. GATE
Noise gate section applied to the input signal, affecting its dynamic behaviour. It is
very useful to reduce or eliminate background noise picked up by a microphone or
existing in a recording, distinguishing between background noise and valid audio
signal:
 when the input signal is below the detection threshold, the gate is "closed"
or, which is the same, applies some attenuation to the signal (determined by
the DEPTH setting in dB)
 when the input signal exceeds the detection threshold, attenuation stops,
leaving the gate "open. " The transition time to this state is determined by the
ATTACK parameter
 when the input signal falls below the detection threshold, the gate stays open
without attenuation the amount of time determined by the HOLD parameter
and finally closes, returning to the attenuation level set (the amount of time
for this is set by the RELEASE parameter)
Available settings are:
 ENABLE/DISABLE: enables/disables the Noise Gate (green button/grey
button). When in DISABLE mode, the rest of the section controls are
disabled.
 THRESHOLD: detection threshold. Defines the input signal level below
which the signal is attenuated with an amount indicated by DEPTH (closed
gate). This parameter ranges from +18 dB to –80 dB.
 DEPTH: attenuation applied to the signal when it is below the detection
threshold (closed gate). This parameter ranges from 0 dB to +80 dB.
 ATTACK: attack time. Determines the amount of time between the passing of the threshold and
the cancellation of the attenuation applied to the input signal (open gate). Adjustment range from
0.1 ms to 500 ms
 HOLD: amount of time the gate stays open (without attenuation) once the signal falls back below
the detection threshold. Adjustment range from 10 ms to 3 s
 RELEASE: release time. Determines the time it takes to close the gate again after the hold time.
In this case, the range covers from 1 ms to 1 s.
A correct setting of the noise gate ATTACK, RELEASE and HOLD times is fundamental, for example to
get a clear and intelligible voice signal from a speech made in a noisy environment.