active real-time attenuation process by narrowband noise feedback and specially adapted device for performing the process

摘要

real-time active narrowband noise attenuation process and device specially adapted for carrying out the process the invention relates to a noise attenuation process and device in a vehicle passenger compartment and comprising at least one transducer, a programmable computer, at least one acoustic sensor, the computer being configured to apply to an electro-acoustic passenger compartment model a controller system model comprising a central controller with fixed coefficients to which a variable coefficient block which is a youla parameter in the form of a youla q block. In a first phase, the electroacoustic model and the correction control law for at least one determined frequency of noise are determined and calculated. In a second phase, in real time, the computer is led to apply the correction control law to the electroacoustic model as a function of the current frequency of the noise to be attenuated.