Transient modulation evaluation method for describing human ear perception

Abstract

The invention relates to a transient modulation evaluation method for describing human ear perception. The method comprises the following steps of synchronously collecting an engine rotating speed signal and an in-vehicle sound signal, and dividing an original sound signal matrix S according to a self-defined rotating speed increment, performing A weighting filtering on the sound signal to obtaina filtered sound signal matrix SA, performing Hilbert transform on the filtered sound signal matrix SA, and performing calculation to obtain a corresponding envelope matrix EA, conducting fourier transform on the envelope matrix EA, and acquiring a modulation depth matrix DA under different modulation frequencies through calculation, and according to the corresponding relationship between the modulation frequency and the modulation order, determining the modulation depth of each modulation order at different rotating speeds based on a peak value maintaining principle. According to the method,the modulation depths of the modulation orders under different transient working conditions can be obtained, so that transient modulation components perceived by human ears are described, and a parameterized evaluation method is provided for benchmarking of the dynamic sound quality of the whole vehicle of different styles.

Description

technical field [0001] The invention relates to the field of sound quality analysis and evaluation, in particular to a transient modulation evaluation method describing human ear perception. Background technique [0002] With the development of automotive NVH control technology, creating dynamic sound quality features and delivering brand DNA has become a development hotspot for major automotive companies. Relevant studies have shown that the sound quality of the sense of motion should be a sound with an appropriate half-order ratio and a certain "modulation" attribute. [0003] At present, there are few studies on the methods of objectively evaluating the phenomenon of sound modulation. The Chinese patent with the publication number CN101598596A proposes a method for analyzing noise sources, especially vehicle noise, and achieves an objective description of pulse-shaped noise phenomena through the calculation of modulation characteristic parameters. The disadvantage of th...

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Problems solved by technology

The disadvantage of this method is that it needs to use multiple band-pass filters to decompose the frequency band of the input signal, and then solve the modulation information. Sub-bandpass filtering will significantly reduce analysis efficiency, so current engineering applications are limited to vector data analysis such as steady-state conditions

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