Noise-cancellation system and method for noise cancellation
First Claim
1. An active noise-cancellation system for a headphone, which comprises a speaker for emitting a speaker signal, a noise-cancellation microphone for receiving a microphone signal and a proximity sensor for receiving a proximity signal that comprises quantitative information regarding a distance of a human hand from the proximity sensor, wherein presence of the hand establishes a coupling between the speaker and the noise-cancellation microphone, the coupling being dependent on the distance, the noise-cancellation system comprising a signal processing device, which is designed:
- to generate a compensation signal based on the microphone signal, wherein the generation of the compensation signal comprises filtering with an adaptable filter characteristic;
to combine the compensation signal with an audio signal in order to generate the speaker signal; and
to adapt the filter characteristic based on the distance.
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Abstract
A noise-cancellation system for a headphone (HP) that comprises a speaker (200, 210) for emitting a speaker signal, a microphone (300, 310, 320, 330) for receiving a microphone signal and a proximity sensor (400, 410) for a receiving a proximity signal comprising quantitative information on the distance of the an object (OBJ) from the proximity sensor (400, 410) has a signal processing device (100). The signal processing device (100) is designed to generate a compensation signal based on the microphone signal, wherein the generation of the compensation signal comprises filtering with an adjustable filter characteristic. The compensation signal is combined with an audio signal in order to generate the speaker signal. The filter characteristic is adapted based on the distance.
23 Citations
25 Claims
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1. An active noise-cancellation system for a headphone, which comprises a speaker for emitting a speaker signal, a noise-cancellation microphone for receiving a microphone signal and a proximity sensor for receiving a proximity signal that comprises quantitative information regarding a distance of a human hand from the proximity sensor, wherein presence of the hand establishes a coupling between the speaker and the noise-cancellation microphone, the coupling being dependent on the distance, the noise-cancellation system comprising a signal processing device, which is designed:
- to generate a compensation signal based on the microphone signal, wherein the generation of the compensation signal comprises filtering with an adaptable filter characteristic;
to combine the compensation signal with an audio signal in order to generate the speaker signal; and
to adapt the filter characteristic based on the distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- to generate a compensation signal based on the microphone signal, wherein the generation of the compensation signal comprises filtering with an adaptable filter characteristic;
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14. A method for active noise cancellation for a headphone that comprises a speaker for emitting a speaker signal, a noise-cancellation microphone for receiving a microphone signal and a proximity sensor for receiving a proximity signal that comprises quantitative information regarding a distance of a human hand an object from the proximity sensor, wherein presence of the hand establishes a coupling between the speaker and the noise-cancellation microphone, the coupling being dependent on the distance, the method comprising:
- generation of a compensation signal based on the microphone signal, wherein the generation of the compensation signal comprises filtering with an adaptable filter characteristic;
combining the compensation signal with an audio signal in order to generate the speaker signal; and
adapting the filter characteristic based on the distance. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
- generation of a compensation signal based on the microphone signal, wherein the generation of the compensation signal comprises filtering with an adaptable filter characteristic;
Specification