Automotive Sound Quality - Accessories, BSR, and Brakes
Automotive Sound Quality - Accessories, BSR, and Brakes
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作者：
G. Cerrato
在本系列的第三篇文章中，我将介绍汽车BSR（嗡嗡声、吱吱声和嘎嘎声）、配件、制动器和车门开/关的声音质量标准。上一篇文章讨论了动力系统、风和道路噪声的声音质量，而本文的目的是提供用于车辆中其他主要子系统/部件的客观参数或指标的简要总结。用于导出这些指标（信号处理）或它们与客户感知（陪审团研究）的相关性的技术的描述超出了本文的范围。然而，提供了广泛的参考文献列表，其中详细描述了这些方法。发动机驱动的附件这些是由发动机通过蛇形皮带驱动的附件-交流发电机、动力转向泵、空调压缩机。在车辆驾驶室中引起的声音质量属性是从原动机（HVAC系统的压缩机、液压辅助转向系统的动力转向泵等）的基频导出的音调分量。感知的属性通常被分类为：动力转向系统的呻吟、呜呜声和嘶嘶声。呻吟是一个术语，通常用于低频范围内的音调（通常为200至400 Hz）。Whine用于较高频率范围（高达2 kHz）的音调，而hiss是一些窄带分量（每个都比音调宽，但通常不超过100 Hz左右）。空调压缩机的呻吟和咆哮
In this third article in the series, I describe the sound quality criteria for automotive BSR (buzz, squeak and rattle), accessories, brakes and door open/close. The previous article discussed the sound quality of powertrain, wind and road noise, while the objective of this article is to provide a brief summary of objective parameters or metrics that are used for the other main subsystem/ components in a vehicle. The description of the techniques used to derive either of these metrics (signal processing) or their correlation to customer perception (jury studies) is outside the scope of this article. However, an extensive list of references is provided, where these methods are described in detail. Engine-Powered Accessories These are the accessories driven by the engine through a serpentine belt – alternator, power steering pump, air conditioning compressor. The sound quality attributes induced in the vehicle cabin are tonal components derived from the fundamental frequencies of the prime movers (the compressor for the HVAC system, the power steering pump for the hydraulic-assist steering system, etc.). The perceived attributes are typically classified as: Moan, whine and hiss for the power steering system •� . Moan is the term typically used for a tone in the low frequency range (typically 200 to 400 Hz). Whine is used for tones in the higher frequency range (up to 2 kHz), and hiss is a few narrow-band components (each one is wider than a tone but typically not broader than 100 Hz or so). Moan and growl for the AC compressor