ADAPTIVE METHOD FOR ACTIVE NOISE DAMPING IN THE CAR INTERIOR AND A DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2021 - IPC G10K11/178 

FIELD: automotive industry.

SUBSTANCE: invention relates to acoustics. A device for active noise damping in the car interior, including a source of information about the engine operating parameter, at least one microphone for measuring sound in the car interior and at least one output converter, a circuit for generating a non-zero target harmonic signal of engine noise based on the engine operating parameter, a circuit for combining a non-zero target harmonic signal of engine noise and an output signal of at least one microphone, as well as a circuit reacting to the combined signal to activate at least one output converter. In this case, a circuit for generating a non-zero target harmonic motor noise signal based on the operating parameter of the engine, a circuit for combining a non-zero target harmonic engine noise signal and an output signal of at least one microphone and a circuit reacting to the combined signal for activating at least one output converter are combined in an adaptive block transmitting signals to each of the output converters via an amplifier, which is supplemented by an estimator of a non-zero target harmonic engine noise signal, receiving signals not only from the source of information about the operating parameter of the engine, but also from each of the microphones, and each microphone is connected to the car body through a vibration isolator, and the frequency estimator, adaptive unit and amplifier are made with the possibility of being powered from at least one power source.

EFFECT: increase in the efficiency of noise suppression in the car interior.

9 cl, 6 dwg