Method, device and controller for evaluating relative variation of sound quality of automobile or engine

Abstract

The invention relates to an evaluation method, device and controller for the relative variation of sound quality of an automobile or an engine, so as to realize the effect of identifying characteristic working conditions or rotational speed sections that cause obvious differences in the subjective perception of human ears. The method includes: collecting the sound sample signal and the rotational speed signal of the entity to be tested and the target entity; dividing the sound sample signal of the entity to be tested into a plurality of first sound signal data blocks according to the rotational speed signal and dividing the sound sample signal of the target entity into A plurality of second sound signal data blocks; determining the first sound quality parameter of each first sound signal data block and determining the second sound quality parameter of each second sound signal data block; according to the first sound quality parameter and the second sound quality parameter Sound quality parameters, determine the difference in sound quality parameters between the entity to be tested and the target entity; determine the relative change in VER caused by the difference in sound quality parameters; determine the characteristic work that causes significant differences in subjective feelings in the analysis conditions according to the relative change in VER condition.

Description

technical field [0001] The invention relates to the field of automobile sound quality analysis and evaluation, in particular to an evaluation method, device and controller for the relative variation of sound quality of automobiles or engines. Background technique [0002] Sound quality reflects the subjective auditory characteristics of the human ear to sound. There are many objective parameters to describe sound quality. Currently, Zwicker Loudness (ZL, Zwicker Loudness) and speech articulation (AI, Articulation Index) are widely used. Since 2007, with the rapid development of the automobile market, users have higher and higher requirements for the NVH performance of automobiles. Today, the sound quality performance of products has become a key consideration for potential car buyers. [0003] Based on the importance of understanding customers' car buying psychology and sound preferences, sound quality benchmarking with competing models / models is gradually becoming a necessa...

AI Technical Summary

Problems solved by technology

However, the current evaluation methods for sound quality are relatively simple, and most of them directly use the absolute magnitude of loudness or speech intelligibility for comparative analysis.

There are two main problems in this analysis method: one is that the magnitude difference or even the size relationship of the objective evaluation parameters of sound quality fluctuates dynamically with the change of operating conditions; the other is that different objective evaluation parameters represent the sound quality evaluation At different latitudes, the relative amount of change that can cause differences in the subjective perception of the human ear is also different

To sum up, there are no quantitative indicators and exact methods for analyzing such problems

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