Psychoacoustic evaluation of internal combustion engine noises

Sebastian Schneider, Tommy Luft, Hermann Rottengruber
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Abstract

When buying a car, the acoustic impression of quality of a vehicle drive train is becoming more and more relevant. The perceived sound quality of the engine unit plays a key role here. Due to the nature of individual background noises, that sound quality is negatively influenced. These noise components, which are perceived as unpleasant, need to be further reduced in the course of vehicle development with the identification and evaluation of disruptive noise components in the overall engine noise being a prerequisite for effective acoustics optimization. In particular, the pulsed ticker noise is classified as particularly annoying in Otto DI engines, which is why this article aims to analyze and evaluate the ticking noise components from the overall noise. For this purpose, an empirical formula was developed which can classify the ticking noise components in terms of their intensity. This is purely perception-based and consists of the impulsiveness, the loudness and the sharpness of the overall engine noise. As with other psychoacoustic evaluation scales, the rating was made from 1 (very ticking) to 10 (not ticking). The ticker noise evaluation formula was then verified on the basis of hearing tests with the help of a jury of experts. According to this, it can be predicted precisely in which engine map areas the ticker noise undermines the pleasantness of the overall engine noise.

内燃机噪声的心理声学评价
在买车时,对车辆传动系质量的声学印象变得越来越重要。发动机单元的感知音质在这里起着关键作用。由于单个背景噪声的性质,该声音质量受到负面影响。这些被认为令人不快的噪声成分需要在车辆开发过程中进一步减少,识别和评估整个发动机噪声中的破坏性噪声成分是有效声学优化的先决条件。特别是,在Otto DI发动机中,脉冲报时器噪声被归类为特别令人讨厌的噪声,这就是为什么本文旨在从总体噪声中分析和评估报时噪声分量。为此,开发了一个经验公式,可以根据滴答声分量的强度对其进行分类。这完全是基于感知的,包括整体发动机噪音的冲动性、响度和尖锐性。与其他心理声学评估量表一样,评分从1(非常勾选)到10(不勾选)。然后,在专家陪审团的帮助下,根据听力测试验证了股票行情噪音评估公式。据此,可以精确地预测在哪个发动机映射区域中,报时器噪声会破坏整个发动机噪声的舒适性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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