Faurecia Creo Ab

Faurecia Clarion Electronics Europe

Nicolas Jean Pignier

Christophe Mattei

Robert Risberg

Jean Francois Rondeau

An audio processing method for an audio system for a seat headrest, the audio system having at least two loudspeakers positioned on either side of the headrest and an audio processing module designed to apply at least one audio processing operation. The method includes the steps of: acquiring images of the head of a user of the audio system using an image acquisition device; processing the acquired images in order to determine, within a predetermined three-dimensional spatial reference frame, a spatial position of each ear of the user; and, on the basis of said determined spatial positions of the ears of the user and based on calibration information previously recorded in connection with an audio processing operation, determining calibration information for adapting the audio processing operation to the determined spatial positions of the ears of the user. Also included is an associated audio system for a seat headrest.

Audio method and system for a seat headrest

A method and a system for creating a plurality of sound zones within an acoustic cavity is provided. The method comprises: providing a plurality of actuators within the acoustic cavity, each for generating a respective acoustic output in response to a respective drive signal, providing, for each of the plurality of actuators, an adaptive filter for receiving a respective input signal, and generating a respective output signal, providing, for each of the adaptive filters, at least one filter coefficient, providing a plurality of error sensors within the acoustic cavity, each for generating a respective error signal e, representing a respective sound detected by the respective error sensor, providing an audio data signal x(n) for generating a desired sound in a desired sound zone of the plurality of sound zones, determining, for the desired sound zone, a set of actuator generation coefficients kg, a set of actuator exclusion coefficients ke, wherein k refers to a kactuator, k=1, 2, 3 . . . , and a set of sensor weighting coefficients mewherein m refers to a merror sensor, m=1, 2, 3.

Method and system for creating a plurality of sound zones within an acoustic cavity

A method for reducing the power of an acoustic primary noise signal (d(n)) at one or more control positions in a vehicle passenger compartment using an adaptive filter. The method comprising to compare a mean correlation coefficient (&#x3b3;(n)) between an electrical error signal (e(n) and a modelled secondary anti-noise signal &#x177;(n) with at least one predefined threshold (&#x3b1;, &#x3b2;).

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Stockholm, Sweden

Nicolas Jean Pignier