毕业设计（论文）-桑塔纳3000轿车噪声测试与评价.doc

摘要
汽车诞生已过百年,其各方面的性能随着科学的发展而得到了极大的提高,但是随着人们生活水平的提高,人们对汽车的综合性能指标又不断提出更高的要求。声音品质已经像舒适性、操纵稳定性那样成为评价汽车的重要指标之一,本论文对Santana3000轿车噪声进行了测试与评价。
首先本论文阐述了国内外车辆噪声评价技术的发展现状,讨论了噪声测试方法与评价方法。基于声强测试技术和计算机接口技术,本论文构筑了声音采集硬件系统,使用实验室的相应测试软件,实现了对汽车的噪声信号的数据采集。基于Zwicker心理学模型,本论文用Matlab语言编写响度的计算程序,同时编写了A-计权指标的计算程序,分别用两种评价指标对Santana3000的噪声信号进行了基于人体主观感觉的客观评价。
最后指出响度指标能更好地符合人对噪声信号的主观感觉。

关键词: 轿车;A-计权;响度;声音品质;测试与评价
Abstract
It is more than one hundred years after the car was invented. All aspects of performance of the car have been greatly improved with the development of science. However, with the improving of people’s living standard, more requirements of prehensive performance of cars are constantly getting higher. Similar like fort, handling stability, sound quality has been e an important index for car evaluations. Therefore, a measurement and evaluation of the Santana 3000 noises, including the interior, exterior, and pass-by noises, were performed in this thesis.
First of all, this thesis investigated the development situation of vehicle noise evaluation technology. Based on the sound-pressure testing technology puter I/O technology, in this work, we established a sound acquisition hardware system. Using in-situ test software in our lab, we collected the date of vehicle noises. Based on the Zwicker psychology model, piled loudness calculation program by Matlab software, as well as an A-weighting calculation program, to evaluate the noise quality of the Santana 3000. We therefore obtained an objectively evaluation based on the subjective human feeling. The conclusions can be drawn that loudness is suitable to evaluate the sound quality.
Key word: Car; A-weighting; Loudness; Sound quality; Measurement and Evaluation
目录
第一章 绪论 1
1
2
3
第二章 Santana3000轿车噪声信号的采集 5
5
5
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6
噪声信号的测量 7
8
9
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Santana3000轿车信号