Vehicle noise sound quality roughness information processing method

Abstract

The invention relates to a vehicle noise sound quality roughness information processing method which comprises the following steps: (1), segmenting noise signals and windowing; (2), carrying out Fourier transformation to the noise signals after windowing, calculating out the exciting sound level of noise signals on a critical band; (3), designing mutually superimposed passages on the critical band, dividing the exciting sound level onto the passages so as to form sub noise signals, then carrying out inverse Fourier transform to the noise signals, so as to obtain time domain sub signals at the exciting sound level; (4), carrying out inverse Fourier transform after demodulation to the time domain sub signals at the exciting sound level, so as to obtain a signal time domain value after modulation, and then calculating out the modulation indexes of each passage; (5), calculating out the related coefficient and the carrier frequency weighting factor among the noise signals of all the passages; (6), calculating out the roughness of the noise signals on each passage and calculating out the total roughness. Compared with the prior art, the vehicle noise sound quality roughness information processing method provided by the invention takes auditory perception characteristics of human ears into consideration, and has the advantages of easiness in method understanding, high precision and the like.

Description

technical field [0001] The invention relates to an information processing method, in particular to an information processing method for vehicle noise sound quality psychoacoustic parameter roughness. Background technique [0002] With the development of society and the advancement of science and technology, environmental noise pollution has become a major social hazard, and traffic vehicle noise has reached 40% of the total urban environmental noise pollution. Therefore, the awareness and prevention of vehicle noise has become an environmental noise An important part of control. In 1996, my country promulgated the "Law of the People's Republic of China on the Prevention and Control of Environmental Noise Pollution". Emission limits are stipulated. However, these standards only use A-weighted sound pressure level to evaluate vehicle noise, and the evaluation results are usually quite different from human hearing experience. This is because there are many deficiencies in A-w...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a roughness information processing method for the sound quality of vehicle noise in order to overcome the above-mentioned defects in the prior art. Its quantification takes into account the correlation coefficient between signals of different channels of noise and the influence coefficient of roughness such as the carrier frequency weighting coefficient, and overcomes the deficiency that current A-weighted sound level and other noise measurement and evaluation indicators cannot reflect subjective feelings.

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