Active noise reduction and shock absorption structure of automobile chassis

Abstract

The invention discloses an active noise reduction and shock absorption structure of an automobile chassis. The structure comprises a microphone unit or a shock sensor used for picking up shock signals of the automobile chassis, wherein the microphone or the shock sensor is placed on the inner side of the automobile chassis; an ANC circuit which is used for generating an anti-noise signal which is opposite to the vibration signal in phase; and a piezoelectric ceramic plane horn driver which is used for outputting the anti-noise signal and acting the anti-noise signal on the automobile chassis in an anti-phase mode, wherein ANC circuit is connected with the microphone or the shock sensor, and the circuit is connected with the piezoelectric ceramic plane horn driver. According to the active noise reduction and shock absorption structure, sound insulation type in-car silent driving can be achieved, the driving and taking comfort is improved, noise pollution in the space in the automobile is eliminated, the maximum automobile noise source is isolated, road tire noise is generated, automobile chassis active noise reduction is cheaper than the acoustic active noise reduction technology using a loudspeaker in the automobile, the effect is better, and the technology is most suitable for new energy electric automobiles. The noise in the vehicle is further reduced, and the riding comfort is improved.

Description

technical field [0001] The invention relates to the technical field of active noise reduction, in particular to an active noise reduction and shock absorption structure of an automobile chassis. Background technique [0002] Active Noise Cancellation (ANC), referred to as ANC, plays a sound signal that is out of phase with the noise signal through the speaker, offsets the spatial noise signal, and achieves the purpose of eliminating noise. This is the active noise cancellation technology. [0003] Active noise cancellation technology has also been limitedly applied to car cockpits, because the car is also a small closed space, and active noise cancellation technology can reduce some noise to a limited extent at the head positions of drivers and passengers. However, to generally reduce noise in a large space in the whole car, the cost of the aforementioned active noise reduction technology is very high, and the effect is not good. Another active noise reduction technology in...

AI Technical Summary

Problems solved by technology

The second is wind noise

However, due to the relatively large space in the car, the noise of each space point is different, and it is difficult to eliminate noise through active noise cancellation methods

Traditional active noise cancellation methods through car horns are often less effective

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