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Active Noise Cancellation

Aug 8, 2014

Having a conversation in a noisy area is difficult enough when you are talking face to face with your partner, and can be virtually impossible when using a communications system.  Entry gates of car parks and toll roads particularly are difficult points to have a  conversation due to the noise of idling car and truck engines. What if this noise could be  suppressed, wouldn’t that make it a lot easier?

STENTOFON Active Noise Cancellation is a software feature for STENTOFON IP stations. A powerful DSP inside the station will measure the microphone signal and calculate the noise components in that signal. It will effectively remove unwanted noise components, leaving a clean speech signal even if the original speech level is below the level of the surrounding noise. The result will be a clear Open Duplex conversation even with a passing train in the background or talking from inside a car while stuck in front of a barrier.

Noise Cancelling
Microphone Comparison

A major advantage of Active Noise Cancellation above the use of a noise cancelling microphone is the fact that the user does not need to speak closely into the microphone, which in certain circumstances can be highly impractical or the need to do so may not be apparent at all to an occasional user.

Level adjustment
The Active Noise Cancellation feature can be switched off, level setting 0, or be set to different levels. Level 7 will give a maximum noise reduction of over 36 dB. This way the station can be optimally tuned to the environment it is in.

Software upgrade
Because the STENTOFON solution is purely software based, the Active Noise Cancellation feature can be added to already installed IP-stations without any hardware modification whatsoever.

As the stations are connected to a data network, the Active Noise Cancellation feature can be installed and configured remotely for widely dispersed locations.

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