1、前言汽车在促进国民经济发展和高提人民生活文化水平等方面均能完成社会赋予的重大任务。但是,随着汽车交通量的增大,噪声等环境问题也随之而产生。道路交通噪声不仅汽车,而且驾驶员技术、道路形式、建筑物构造、交通流动情况等也有影响,开展对作为噪声源的汽车低噪声化的研究是需要。这是大型汽车 1. Foreword Automobiles can accomplish the major tasks entrusted by the society in terms of promoting the development of the national economy and raising the standard of living of the people. However, with the increase of traffic volume, noise and other environmental problems also arise. Road traffic noise not only affects the automobile, but also influences driver technology, road form, building structure, traffic flow, and so on. It is necessary to carry out researches on low-noise automobile as a noise source. This is a large car