Psychoacoustic analysis of squeaking and rattling noises inside vehicle cabins

Abstract

Annoyance of vehicle passengers due to squeaking and rattling noises is investigated. The investigation was carried out in the following steps: measurements, physical analysis of the measurement results and a jury test. The jury was made of 60 people with normal hearing. The participants were exposed to different noise signals generated by different sources. Two psychoacoustic parameters were evaluated by the jury test: annoyance and pleasantness, both for squeaking and rattling noises. Psychoacoustic indices depending on loudness and sharpness metrics were found by a regressive analysis.

Psychoacoustic modelling of vehicle side mirror power-fold actuator noise characteristics

“…The reference metric threshold values were adopted from data taken from good actuator samples. The second approach is to formulate a regression model to relate the power-fold actuator subjective rating indices with relevant objective psychoacoustic metrics where standard statistical methods of regression and correlation analysis are employed [7]. This article will focus on application of regression analysis for sound quality evaluation and diagnostics of power-fold actuators.…”

“…Correlations of 'pleasantness' or 'annoyance' and 'noise quality index' (NQI) have been developed and updated with respect to advances and refinement of psychoacoustic metric models and acoustic measurement techniques. These models have applications ranging from room acoustics [5], automotive or engine noise [6,7] to general noise characterisation [1,4,8]. However, no product sound modelling is reported resulting from correlations of human subjective ratings on the ten-point scale (SR ¼ 1-10) with physical measurement signal values.…”