Based on the causations and frequency configurations of vehicle interior noise , we do the test on a homemade vehicle by integer insulating means 在明确了汽车车内噪声产生机理及其频率结构的基础上，采用整体隔离法对国产某车型的车内噪声进行了试验研究。
Starting from harm of noise and the meaning of controlling the noise , and then the element theory influencing interior noise and the basic control methods are analyzed 先从噪声的危害及控制噪声的意义讲起，再分析影响车内噪声的主要噪声源产生的机理以及控制的基本方法。
The noise inside the coach is an important index to appraise the coach comfort , therefore , the coach manufacturers have more concerns about the control of noise 客车车内噪声是评价乘车舒适性的一项重要指标，因此，对客车车内噪声的控制也逐渐引起各生产厂家的重视。
This article explains vehicle interior noise and its basic theory , also explains how to consider structure and material based on control noise during designing 摘要阐述汽车车内噪声来源与产生的机理，系统的论述在设计过程中如何从控制噪声的角度出发考虑产品的结构、材料等。
However , there are few little research documents on the coach noise control all around the country , all of coach manufacturers are still finding the way in the noise control 但是，目前国内对客车车内噪声控制的系统研究文献较少，各客车生产厂家对车内噪声的控制还处在摸索阶段。
Aimed at the current situation of research on the vehicle interior noise , this thesis conducts a conclusive analysis on the category of the source of vehicle noise and the noise controlling method 本文针对国内外汽车车内噪声的研究现状，对汽车噪声的分类以及噪声控制方法进行总结。
This article mainly concern the sound material in the engine compartment of a passenger car , and obtain that the old material which can not satisfy the need have to be replaced 摘要通过测量分析发动机舱内噪声频谱特性，对某型客车发动机舱的原用吸声材料进行测量，并得出了原有材料选用不适当的结论。
The importance and necessity of controlling vehicle interior noise are expounded through analysis the history and trend of studying vehicle interior noise , and its present application in the process of automotive products development 随着现代汽车技术的不断发展，车内噪声特性已成为汽车乘坐舒适性的重要评价指标之一。
This thesis gains a handy and exact testing and analyzing method on vehicle interior noise by designing three different testing means : immobile test , dragging test and road test 设计了三种不同的试验工况：原地试验、拖行试验、道路试验，并用传递函数方法对试验结果进行分析，总结出一种简便准确的分析车内噪声传递路径的实验手段和分析方法。
Ameliorating the vehicle interior acoustics circumstance and debasing the vehicle interior noise level are the question that governments and manufacturers faced to together . the research on the vehicle interior noise has been recognized 改善车辆内部声学环境，降低车内噪声水平，是各国政府和车辆生产厂家共同关注的问题，汽车车内噪声的研究已受到普遍重视。
