The working principle of automobile active noise reduction (ANC) technology is that the noise emitted by the noise reduction system (muffler speaker) is opposite to the direction of external noise source (the phase difference is180; ), sound waves with similar amplitudes, the superposition of two kinds of sound waves will neutralize the noise and cancel each other, thus achieving the effect of vehicle noise reduction.
Can automobile active noise reduction be installed?
The auto active noise reduction sound system could not be installed in the later period of China. At present, what vehicles can do in the later stage is to effectively reduce noise by using sound insulation materials or replacing mute accessories, such as reducing engine noise, attaching sound insulation cotton to firewall, attaching sound insulation cotton to engine room and hood, and shockproof plate. , so as to try to absorb the noise brought by the engine.
Active noise reduction technology was first applied to headphones. Cadillac is the first automobile brand to apply active noise reduction technology. 20 13 Cadillac XTS luxury car is equipped with BOSE5. 1 surround sound advanced sound system, which adopts active noise reduction technology. It collects noise samples through the microphone in the car, and sends out the opposite audio through the speaker after processing, thus achieving the effect of noise reduction in the car.