The invention discloses a
noise reduction method for a vehicle, and the method comprises the following steps: S1, respectively measuring a
loudspeaker of each sound
reproduction channel of a vehicle-mounted audio
system, and obtaining the maximum non-
distortion output amplitude of a
signal corresponding to each frequency point in a
frequency domain; S2, generating a reference
signal, and filteringthe reference
signal through an
adaptive filter to generate a
control signal; S3, comparing the
control signal with the maximum output amplitude, if the
control signal is not greater than the maximumvalue of the maximum output amplitude, directly converting the control signal into an
analog signal, and feeding the
analog signal to loudspeakers of corresponding sound
reproduction channels througha power
amplifier; and if the control signal is greater than the maximum value of the maximum output amplitude, performing power compression on the control signal, converting the control signal subjected to power compression into an
analog signal, and feeding the analog signal to the loudspeakers of corresponding sound
reproduction channels through the power
amplifier. The possibility of the
divergence of an
active noise control system can be solved, and abnormal sound is prevented from being generated as soon as possible.