Motor high-frequency noise masking method and device

Abstract

The invention discloses a motor high-frequency noise masking method and device. The method comprises the following steps: generating a masking curve function based on a high-frequency noise signal generated by a motor; collecting the high-frequency noise signal generated by the motor in real time; generating a masking sound signal according to spectrum data of the collected high-frequency noise signal and the masking curve function, selecting a background sound from a background sound database according to the spectrum data of the collected high-frequency noise signal and processing the selected background sound according to the masking curve function; and carrying out synthesis on the generated masking sound signal and the selected background sound and outputting the synthesis result. Themotor high-frequency noise masking method can mask the high-frequency noise generated by the motor to enable the noise to be expressed through the background sound which is pleasant to people, thereby helping to improve use experience of people on motor related products.

Description

technical field [0001] The invention relates to the technical field of noise control, in particular to a method for masking high-frequency noise of a motor and a device for masking high-frequency noise of a motor. Background technique [0002] With the rapid development of the new energy industry, more and more motor-related new energy products appear in our lives. However, while new energy products bring convenience to our lives, they also bring us the trouble of motor noise. [0003] The high-frequency noise of the motor is a kind of comprehensive noise, which includes mechanical noise, electromagnetic noise and air noise, and the frequency is from 1KHz to 12KHz or higher. The control of this kind of noise is very necessary. [0004] In related technologies, there are mainly two types of motor noise control schemes: one is passive noise reduction, including structural optimization, elimination of resonance, and damping materials for sound absorption and insulation, such ...

AI Technical Summary

Problems solved by technology

However, due to the high frequency and short wavelength of motor noise, it is difficult to capture its phase to generate anti-phase sound waves to actively cancel

Even if it can be captured, it is necessary to constantly adjust the search step size, so that the number of cycles will be very large, the amount of calculation will be large, and the algorithm will be difficult to implement; even if the algorithm can be implemented, the hardware requirements will be high and the cost will be high.

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