Gentner XAP 800, Руководство по обслуживанию

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ECHO AND NOISE CANCELL ATION • NOISE CANCELL ATION
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Elimination of Noise
Since the term "noise" covers a variety of unwanted audio generated by many different sources, there is also a
variety of ways to cancel the noise.
Most noise can be eliminated by:
Acoustical treatments in and around noise sources.
Conducting microphone placement tests.
Reducing the amount of reflective surfacing.
Identifying and reducing or eliminating hum.
Using quality, shielded cable and connectors.
Using a noise cancellation device, such as that found in the XAP 800.
Gentner’s XAP 800 features a revolutionary new algorithm that actively eliminates background noise within the
vocal range on each mic input. Unlike other noise canceling devices, the XAP 800 does not simply gate audio off
when a mic input drops below a specified level. Gentner’s noise cancellation actively separates and attenuates
ambient noise from the speech signal, leaving speech audio virtually untouched. It effectively reduces noise
between 20Hz and 20kHz.
Gentner’s noise cancellation also ensures that your entire system functions more efficiently. Noise not only interferes
with human communication, it unnecessarily hampers all sound system components (i.e., DSPs, amplifier power,
loudspeaker bandwidth), thereby significantly decreasing a system’s power and responsiveness. By reducing
signals unassociated with human speech, the XAP 800 ensures the entire system sounds clearer and is much more
efficient and responsive.
Noise Cancellation vs. Echo Cancellation
Since the job of any sound system is to amplify audio signals, all noise is picked up and amplified. Even barely
audible signals may become very loud once picked up by a sound system. However, unlike echo cancellation, noise
cancellation is much more challenging because it lacks a reference signal. Despite these challenges, Gentner’s
revolutionary noise canceller discerns and actively tracks ambient noise and eliminates it from the final mix.
The XAP 800’s noise canceller is an excellent complement to the acoustic echo canceller. This is because it
reduces ambient noise, which can cause the echo canceller to deviate from an optimal echo cancellation solution.
By reducing much of the ambient noise, it ensures the echo canceller has the purest, most accurate room reference
by which to cancel echo.