Active noise reduction method, system, and new energy vehicle
AssigneeBYD Company Limited
InventorsYaxuan Sun, Yongji Zhao
Life of this patent
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Abstract
The present disclosure provides an active noise reduction method, a system, and a new energy vehicle. The active noise reduction method includes: obtaining a frequency of a high-frequency noise signal in an acoustic environment, constructing and generating a harmonic masking signal according to the frequency of the high-frequency noise signal, where the harmonic masking signal includes a harmonic signal and a masking signal, and the harmonic signal is a subharmonic wave of the high-frequency noise signal, and inputting the harmonic masking signal into a sound playback apparatus for playback to output a noise reduction construction sound, and performing noise reduction on the acoustic environment.
Claims15
An active noise reduction method, comprising:
- obtaining a frequency of a high-frequency noise signal in an acoustic environment;
- constructing and generating a harmonic masking signal according to the frequency of the high-frequency noise signal, wherein the harmonic masking signal comprises a harmonic signal and a masking signal, and the harmonic signal is a subharmonic wave of the high-frequency noise signal;
- and
- inputting the harmonic masking signal into a sound playing device for playing, to output a noise reduction construction sound and to perform noise reduction on the acoustic environment.
An active noise reduction system, comprising:
- a high frequency noise signal frequency obtaining module, to obtain a frequency of a high-frequency noise signal in an acoustic environment;
- a harmonic masking signal generation module, to construct and generate a harmonic masking signal according to the frequency of the high-frequency noise signal, wherein the harmonic masking signal comprises a harmonic signal and a masking signal, and the harmonic signal is a subharmonic wave of the high-frequency noise signal;
- and
- a harmonic masking sound playback module, to input the harmonic masking signal into a sound playing device for playing, to enable the harmonic masking signal to act with the high-frequency noise signal in the acoustic environment and to perform noise reduction on the acoustic environment.
Dependencies are inferred from the claim text.