Prediction method for subjective scoring on interior noise during vehicle acceleration

Abstract

The invention discloses a prediction method for subjective scoring on interior noise during vehicle acceleration. The method comprises the following steps of: step 1, collecting signals wherein soundpressure levels of an acceleration noise and a multi-level acceleration noise in ears change with the engine speed during the vehicle acceleration process and storing the signals; step 2, calculatinga noise kurtosis according to the current engine speed and the sound pressure level, and calculating a normalized noise kurtosis and a maximum normalized noise kurtosis through the noise kurtosis; andstep 3, calculating a subjective prediction score of the noise corresponding to different rotation speeds during the vehicle acceleration process and a total value of the subjective evaluation and prediction scores in the whole acceleration process according to the noise kurtosis, and obtaining an acceleration noise evaluation condition according to a standard scoring table. The invention adoptsthe determined objective evaluation method based on a real vehicle measurement, so that the uncertainty is greatly reduced for the traditional subjective evaluation, the problems can be quickly and accurately identified or the nuances can be compared, and the reference is high.

Description

technical field [0001] The invention relates to an acoustic / noise measurement method in the field of automobiles, in particular to a prediction method for subjective scoring of interior noise when the vehicle accelerates. Background technique [0002] At present, the penetration rate of automobiles is already very high. With the continuous development of automobile technology, the acceleration performance of automobiles is getting better and better. However, during the acceleration of automobiles, the high-speed rotation of the engine will inevitably produce noise; Evaluation, the existing method is mainly to carry out noise evaluation by driving the vehicle subjectively, which consumes a lot of manpower and material resources. At the same time, the evaluation results are affected by many influencing factors, resulting in large deviations, especially when the sample size is small. The subjective tendency will lead to a large deviation of the subjective evaluation method. The...

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Problems solved by technology

[0002] At present, the penetration rate of automobiles is already very high. With the continuous development of automobile technology, the acceleration performance of automobiles is getting better and better. However, during the acceleration of automobiles, the high-speed rotation of the engine will inevitably produce noise; Evaluation, the existing method is mainly to carry out noise evaluation by driving the vehicle subjectively, which consumes a lot of manpower and material resources. At the same time, the evaluation results are affected by many influencing factors, resulting in large deviations, especially when the sample size is small. The subjective tendency will lead to a large deviation in the subjective evaluation method. Therefore, the existing scoring methods are greatly reduced in reference to the identification of problems or the comparison of performance.

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