Method for evaluating transmission squeal based on masking effect

Abstract

The invention is suitable for the field of noise processing technology improvement, and provides a method for evaluating transmission squeal based on a masking effect, and the method comprises the steps: S1, carrying out the data collection of the squeal working conditions of a plurality of different vehicle types; S2, arranging the collected data and designing fine whistling sound with different orders at different rotating speeds; S3, subjectively evaluating the sound samples and extracting sound quality parameters; S4, screening variables through Pearson correlation analysis of subjective scores and objective parameters; S5, performing Z-score standardization processing on the screened subjective and objective parameters, and further fusing the objective parameters through principal component analysis (PCA); S6, after fusion is completed, carrying out SVM optimization to form an evaluation system of transmission squeal; and S7, after the evaluation system is formed, inputting the values of the three objective psychological parameters obtained by testing to obtain a subjective evaluation score, and judging the severity of the howling according to the subjective evaluation score. Through the three parameters, the prominence degree of howling in one critical frequency band, the prominence degree of howling sound in two adjacent critical frequency bands and the masking effect of slope excitation influence of loudness are considered.

Description

technical field [0001] The invention belongs to the field of noise processing technology improvement, in particular to a method for evaluating transmission whistling based on masking effects. Background technique [0002] The current method generally uses the total sound pressure level to subtract the empirical ΔL (such as 15dB(A), etc.) to obtain the target line, and compares the howling order with the target line to judge whether there is howling. For cars with different requirements, the defined ΔL values ​​are different, and there is no uniform standard. [0003] Under coasting conditions, the red solid line is the total sound pressure level that changes with the engine speed, and the red dotted line is the target curve obtained after subtracting 15dB(A) (ie ΔL) at different speeds. Compare the magnitude of the howling order curve (such as 11th and 30th order) with the target curve (red dotted line) at different speeds. If the order curve is greater than the target curv...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for evaluating transmission howling based on the masking effect, aiming at solving the technical problem of being unable to quantify the severity of howling

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