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Suppression of Radio Transmission Burst Noise in Headphones

Simplex and half-duplex communication systems (e.g. radios) require the talker to press a Push-To-Talk (PTT) button to enable the transmitter (and disable the receiver). The pressing of this PTT button or the release (when the talker is finished talking) of the button generates a short burst of static noise. This burst noise, although brief, is often louder than the speech, and can be painful when listening to in headphones. Algorithms to detect and attenuate the level of the burst are described and tested, including several existing and newly developed algorithms.

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AES - Audio Engineering Society