See Also: NoiseSuppressor Members
Noise Suppressor (NS).
Noise suppression (NS) is an audio pre-processing which removes background noise from the captured signal. The component of the signal considered as noise can be either stationary (car/airplane engine, AC system) or non-stationary (other peoples conversations, car horn) for more advanced implementations.
NS is mostly used by voice communication applications (voice chat, video conferencing, SIP calls).
An application creates a NoiseSuppressor object to instantiate and control an NS engine in the audio framework.
To attach the NoiseSuppressor to a particular Android.Media.AudioRecord, specify the audio session ID of this AudioRecord when creating the NoiseSuppressor. The audio session is retrieved by calling Android.Media.AudioRecord.AudioSessionId on the AudioRecord instance.
On some devices, NS can be inserted by default in the capture path by the platform according to the NoType:android/media/MediaRecorder$AudioSource;Href=../../../../reference/android/media/MediaRecorder.AudioSource.html used. The application should call NoiseSuppressor.getEnable() after creating the NS to check the default NS activation state on a particular AudioRecord session.
See Android.Media.Audiofx.AudioEffect class for more details on controlling audio effects.