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Method and apparatus for controlling an active noise reduction system

A technology of active noise reduction and control methods, applied in the direction of active noise control, sound-emitting devices, instruments, etc., can solve problems such as ineffectiveness, system deactivation, and insufficient comprehensiveness of satisfaction

Inactive Publication Date: 2018-04-13
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] These prior art solutions are all based on this obvious concept, and therefore, due to the risk of increased noise in fault situations, it is best when the return sound, picked up by a microphone or in some other way, exceeds a certain threshold deactivate the system
However, these existing methods and systems suffer from the problem of being ineffective in cases where the fault originates from the acoustic sensor itself
[0011] These more recent solutions, like other known solutions, are not comprehensive enough to provide complete satisfaction

Method used

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  • Method and apparatus for controlling an active noise reduction system
  • Method and apparatus for controlling an active noise reduction system
  • Method and apparatus for controlling an active noise reduction system

Examples

Experimental program
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Embodiment Construction

[0037] figure 1 A motor vehicle is shown, generally designated 12 , including an Active Noise Cancellation (ANC) system, some elements of which, explained hereinafter, are simply labeled on the outside of the vehicle 12 to simplify the explanation.

[0038] One or more microphones 11, generally three microphones, each pick up an error signal u at a predetermined service point of the vehicle 12 mic . Each service point is predetermined during the vehicle prototyping and testing phases in order to obtain the best noise reduction in the driver's and preferably each passenger's ears. These microphones can thus be arranged as close as possible to the driver's and each passenger's head or at points of the vehicle that are geometrically related to the sound amplitude nodes of the noise near the passenger's head.

[0039] One or more enclosures or loudspeakers 13 (whose number generally varies between four and five) receive control signals u from an electronic device 14 indicated by...

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Abstract

The method applies to a vehicle (12) in which an active noise reduction system (15) comprises one or more loudspeakers (13) for producing one or more output sound signals which oppose the noise and one or more microphones (11) for picking up one or more feedback signals which quantify the noise reduction obtained. To implement the method, the vehicle (12) comprises a control device (23) which comprises feedback verification means designed to establish a feedback diagnosis by analyzing at least one feedback signal (umiC) in combination with means of activation (24) and of neutralization of the active noise reduction system (15) which are driven so as to activate, respectively deactivate, the active noise reduction system following a positive feedback diagnosis, respectively following a negative feedback diagnosis.

Description

technical field [0001] The present invention relates to a method for coping with failures in an Active Noise Cancellation (ANC) system. [0002] More precisely, the invention relates to a method for controlling an active noise reduction system, for example in the interior of a vehicle, comprising loudspeakers for generating one or more acoustic output signals inverse to noise and for One or more microphones that pick up the return signal of one or more measurements of the obtained noise reduction effect. [0003] The invention also relates to a device and a computer program for carrying out the method. Background technique [0004] Active noise cancellation is an old topic. So in 1930, Henri Coanda described in his patent FR 722274 a method of noise reduction, which consists in obtaining a silent zone through the interference of sound waves. This idea is good but not easy to achieve. Then in 1934 Paul Lueg in his patent US 2043416 was limited to the simplified case of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K11/178
CPCG10K11/17825G10K11/17833G10K11/17883G10K2210/1282G10K2210/503
Inventor H·伊利B·安德罗
Owner RENAULT SA