User`s manual

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Figure 4-65: NoiseEQ™ Control Window
Description of controls/indicators is as follows:
Frequency Specific Used to specify the amount of noise reduction that the spectral subtraction
Noise Reduction: attempts to apply to the input signal within each of 20 separate groups of
frequency bands. Within each band, adjustment range is 0 (no attenuation) to
100% (maximal attenuation) in 1% increments. In much the same manner as
the 20-Band Graphic Equalizer, special extra controls allow the user to Link
Frequency Sliders, Zero All, Maximize All, Normalize, and Store/Recall
complete curves to/from disk files.
Noise Smoothing Used to activate or deactivate a special feature that minimizes the amount of
Button: audible artifacts that occur when aggressive settings are used for the Master
Attenuation Control. Feature is either on (LED illuminated GREEN) or off
(LED not illuminated).
Output Gain: Allows user to apply between 0 and 30dB of makeup gain to the processed
output signal to maximize the signal level prior to final equalization, AGC, and
listening/recording. The associated Output bargraph shows the actual output
signal level after the gain has been applied.
Clear Button: Used to clear the spectral subtractionsolution currently in memory and restart
the algorithm from scratch.