Browse Publications Technical Papers 2019-01-1517
2019-06-05

sound quality prediction modelling for transient sound of vehicle door latch closure 2019-01-1517

Door latch closure sound has contribution on sound quality of vehicle door slam sound. This paper focuses on the modelling of subjective sound quality for door latch closure sound. 24 various latch closure sound samples were recorded by binaural artificial head in semi-anechoic room. To acquire subjective preference of the sounds, these samples were then evaluated subjectively by a novel dynamic paired comparison method which can reduce the evaluation work load and add new samples easily comparing to the traditional paired comparison method. During the subjective evaluation, the shudder effect induced by multi-impact of latch components during closing movement was found strongly affecting the subjective perception of door latch closure sound. By using wavelet analysis the mechanism of shudder effect was identified. A new objective metric,” shudder level”, which can identify the multi-impact of latch components was proposed to quantify this shudder effect based on a time weighting function. Furthermore, correlation analysis was also carried out to determine the most correlated metrics between psychoacoustic (objective) and subjective evaluation results as inputs for the subsequent prediction model. The sound quality of door latch closure was modeled by means of Multi-Linear Regression Function (MLRF) with and without considering the shudder effect. The result shows that the model which takes the shudder effect into account gives a better prediction on door latch closure sound quality.

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