Audio signal processing method and apparatus

A noise cancellation system for a vehicle takes microphone signals AS-n, generates a frequency domain representation of them and receives an operating signal OS-n which indicates an operating state of the vehicle (eg. engine RPM). These are then used to determine an audio profile of eg. engine noise...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Abhijith Balan, Terence Soares, Anirudh Khawas, Sarvesh Khandelwal
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PHYSICS SOUND-PRODUCING DEVICES SPEECH ANALYSIS OR SYNTHESIS SPEECH OR AUDIO CODING OR DECODING SPEECH OR VOICE PROCESSING SPEECH RECOGNITION
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Beschreibung
Zusammenfassung:	A noise cancellation system for a vehicle takes microphone signals AS-n, generates a frequency domain representation of them and receives an operating signal OS-n which indicates an operating state of the vehicle (eg. engine RPM). These are then used to determine an audio profile of eg. engine noise to be cancelled from the audio signal via eg. an anti-phase signal from a loudspeaker.