Noise Cancellation

Noise Cancellation stops ambient room noise from being picked up by the microphones on the conference phone. Noise Cancellation is also known as Active Noise Control or Active Noise Reduction (ANR) or antinoise. It is process of prohibiting unacceptable sound. Sound made up of pulse in the air which can be express as wave. If a speaker emits a sound whose wave has the same amplitude and the exact opposite polarity to the original sound, the waves cancel out and the result is no sound at all.

Noise cancellation device uses a microphone to pick up waves from a noise medium. The output of the microphone is assign to a computerized signal processor, which produces a waveform which is similar to the original one, but it is 180 degree out of phase. This amplified out of phase signal is directed back towards the noise source through speaker phone. When these both sound waves combines, they cancel out each other & this cause reduction in noise.

HVAC systems, projectors, laptops & fluorescent lights are some of the examples of ambient noise sources. ClearOne uses a spectral content analysis technique which separates a communicator's voice from ambient noise and only applies noise cancellation to ambient noise sources.

For more information please visit http://www.clearone.com