排气噪声是驾驶室内主要噪声来源。
发动机排气噪声是整车噪声的主要噪声源之一。
The exhaust noise of engine is one of the main noise sources of automobile noise.
对柴油机的排气噪声进行了有源消声的初步设计；
The model to control intermittent diesel exhaust noise was established and an elementary design was proposed.
用心听一听，是否有明显的漏气声或过分的排气噪声。
Listen to hear if there are any obvious air leaks or excessive exhaust noises.
列出了排气噪声和废气含量测试结果，并进行了分析。
It gave the experiment results and analyses of exhaust noise and exhaust contents.
试验表明，微穿孔板吸声结构可有效地降低排气噪声。
Results show that the acoustic system of micro perforation plate can effectively reduce discharge noise.
目前，控制排气噪声最有效的途径是在排气系统上使用消声器。
At present, the most effective measure to control exhaust noise is using muffler in exhaust system.
分析了摩托车的5种噪声源，指出了排气噪声占有相当大的比例。
The paper analyses 5 noise sources of motorcycle, pointing out that the exhaust noise takes a considerable share.
研究结果表明：该模型在发动机纯排气噪声预测方面具有足够的精度；
Simulation calculation and experimental study for the pure exhaust noise of engine were carried out under the same operating conditions.
针对某型柴油机排气噪声频谱特性，设计了一种新型阻抗复合式排气消声器。
The design process of a new type of exhaust silencer for some diesel engine models was discussed.
发动机排气噪声是汽车噪声中一个主要声源，消声器是控制排气噪声的一个重要方法。
Engine exhaust noise is one of the main sources of automobile noise, and using of silencer is an important method controlling exhaust noise.
根据特种发动机排气噪声的特性和消声器的安装要求，设计了一个组合式排气消声器。
According to the exhaust noise characteristics of special engine and the installation request of exhaust muffler, the exhaust muffler for special engine was designed.
与气动球齿修磨机相比具有机械效率高，方便修磨，无排气污染、无排气噪声等优点。
Compared with a pneumatic ball tooth grinder, the electric ball tooth grinder has the advantages of high mechanical efficiency, convenient grinding, non exhaust pollution, non exhaust noise, etc.
内燃机排气消声器的实际消声性能既与消声器本身结构有关，又与排气噪声源性质有关。
The performance of an exhaust muffler of internal combustion engine is related not only to the construction of itself, but also to the characters of the exhaust noise source.
汽车排气噪声是汽车的主要噪声源之一，而汽车排气系统的性能决定着排气噪声的水平。
Automobile exhaust noise is one of the main noise sources of vehicles, while exhaust system's performance determines the level of exhaust noise.
并根据声学理论分析排气噪声，提出理论上的予计及试验实测压缩机排气噪声的一种方法。
And then, according to the theory of acoustics, the noise of the discharge of a compressor is analysed and a method of prediction and testing of the discharge has been recommended.
通过实验证明，蜂窝陶瓷是阻抗复合性结构，用它制成的消声器对车辆排气噪声可有效抑制。
Experiments demonstrate that the honeycomb-like ceramics has an impedance compound structure, the silencer made of which can effectively control vehicle exhaust noise.
通过对排气噪声的频谱分析及对排气噪声控制方法的讨论，认为消声器能有效控制排气噪声。
By analyzing the exhaust noise frequency spectrum and the exhaust noise control methods, the muffler is considered a effective way of controlling exhaust noise.
介绍了为降低排气噪声而改善发动机排气系统设计的方法和摩托车使用过程中应采取的措施。
The paper also describes the improved design method of motorcycle engine exhaust system which reduces the exhaust noise and the measures the motorcycle should take during its operation.
穿孔屏对改善消声效果有较大的作用，同时，对发动机排气噪声中的脉动声有较好的消除作用；
The perforating shield contributes a lot in improving the muffling effect and at the same time has a function of eliminating the pulsating sound in the engine exhausting noise.
排气系统具有控制发动机排气噪声的重要作用，所以对发动机排气系统进行仿真分析很有必要。
The exhaust systems play the important role of controlling the engine exhaust noise, so it is necessary to simulate and analyse the characteristics of the exhaust system.
通过NF50排气消声器的设计，介绍了降低摩托车排气噪声的技术及排气消声器的设计方法。
This paper presents the technique of reducing motorcycle noise and the design method of the exhaust silencer for NF50 motorcycle.
因此，解决该拖拉机噪声问题须首先降低排气噪声、发动机散热风扇噪声和发动机机罩振动噪声。
Therefore, in order to solve the problem of the tractor noise, the exhaust noise, the engine ventilator noise and the noise of vibrating cover of the engine should be reduced first.
介绍噪声的特征、危害性和交通车辆噪声，包括汽车排气噪声、发动机噪声、轮胎噪声和喇叭噪声等。
The features and harmfulness of noises including the traffic noises produced by engine exhaust, tyre, horn, etc.
减小排气噪声是降低汽车噪声的关键，目前在排气系统中安装排气消声器是减少排气噪声的主要方法。
The reduction of exhaust system noise is the key to the reduction of automobile noise. At present, the main method to reduce exhaust noise is by setting muffler in automobile exhaust system.
针对柴油机（4 85 ）低频排气噪声，对其产生机理、规律及其影响因素等作了理论计算、分析及实验。
The low frequency exhaust noise of a diesel(4 85), its generation, frequency characteristics and influencing factors have been studied through theoretic calculation, analysis and experiment.
发动机排气噪声是工程机械整机噪声中最主要的噪声源，对于工程机械整机噪声水平的高低有重要的影响。
Engine exhaust noise is a main source for construction machinery noise, and it has a very significant impact on the level of construction machinery noise.
针对如何大幅度降低排气温度并兼顾防治海水倒灌和削减排气噪声，本文提出了一种水喷淋消声器设计方案。
In view of the factors that how to reduce significantly the exhaust temperature, prevent water pour backward and reduce the exhaust noise, the present theses presented a water spraying silencer.
针对如何大幅度降低排气温度并兼顾防治海水倒灌和削减排气噪声，本文提出了一种水喷淋消声器设计方案。
In view of the factors that how to reduce significantly the exhaust temperature, prevent water pour backward and reduce the exhaust noise, the present theses presented a water spraying silencer.
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