I wanted to listen, see if I could hear any type of engine noise. I could not hear anything.
我想听听，看看我是否能听到任何类型的引擎噪音。我什么也听不到。
They even pipe in engine noise and vibrate the seats to replicate a truly unpleasant airplane dining experience.
他们还往机舱内输入机器噪声，震动座椅，惟妙惟肖地复制出令人不快的飞机就餐体验。
The two choices of new engine could yield fuel savings of 15% (airlines consider anything above 2% to be meaningful), and will reduce carbon emissions and engine noise.
新引擎的两种选择可以节油15%(航空公司认为节油率超过2%才有意义)，并减少碳排放以及引擎噪音。
Ways to reduce engine noise for small-wheeled tractors have been indicated.
为小四轮拖拉机发动机的降噪指明了方向。
Engine noise is the major noise source of automobile; air power noise is one of composition parts of engine noise.
发动机噪声是汽车的主要噪声源，空气动力噪声是发动机噪声的组成部分之一。
Because the hydraulic valve plunger automatic control valve clearance is zero gap, simultaneously may reduce the engine noise.
由于液压挺杆自动调节气门间隙为零间隙，同时可降低发动机噪声。
As the bypass ratio of turbofan engine is more and more high, fan noise is a more important part to the overall turbofan engine noise.
随着飞机广泛使用的涡轮风扇发动机涵道比的不断提高，风扇噪声在飞机总噪声中占有越来越突出的地位。
Applying the order bi-spectrum in the analysis of engine noise signals shows that it can extract the fault characteristics and realize the state monitoring.
运用此方法对内燃机主轴承不同间隙下的噪声信号进行分析，结果表明，此方法能有效地提取故障的特征，实现状态监测。
Because engine noise takes on complicated frequency characteristics, if original noise signal is not collected, the noise control effect will not be evident.
由于发动机噪声的频率成分比较复杂，如果采用主动降噪技术不能适时采集到源噪声信号，就达不到理想的降噪效果。
Vehicles can start a smooth, shift easily, and significantly reduce engine noise and vibration, effectively improve the performance of the engine and gearbox.
可使车辆起步平稳、换挡轻松，并极大降低发动机噪音和震动，有效提高发动机和变速箱性能。
The paper reports the results of an investigation of the characteristic of combustion pressure oscillation in a D. I. diesel engine and their effect on engine noise.
本文报告了对直喷式柴油机燃烧压力振荡特性及压力振荡对燃烧噪声影响规律的研究。
The results show that the engine noise is additive weak-intensity continuous spectrum or compound spectrum and for some frequencies it is both continuous and linear.
结果表明：发动机噪声主要是加性、低强度的连续频谱，在某几个频率成分上也分布着线状频谱。
From the correlation dimension analysis of noise signals of internal combustion engine, it was proved that engine noise signals have an obvious fractal characteristic.
通过对实际测量的内燃机噪声信号的关联维数计算分析，证明了内燃机噪声信号的分形特性。
Using acoustical holography, some interesting results are shown about the different noises of a high speed vehicle, such as engine noise, tire noise and aerodynamic noise.
它能够用来分析汽车在高速运动过程中发动机的噪声、轮胎噪声和空气动力学噪声。
Unbalanced two-stage reciprocating inertia force can be balanced by using Lanchester's double-shaft balance system, so that the engine noise and vibration could be reduced notably.
采用兰氏双轴平衡系统，可以平衡二阶往复惯性力，使柴油机的噪声和振动明显下降。
This paper introduces the requirements for sound testing environment by the national standards for engine noise testing and proposes the targets for the construction of engine noise laboratories.
本文介绍了国家标准中内燃机噪声测试对声学测试环境的要求，提出了内燃机噪声实验室建设的指标。
This paper introduces the requirements for sound testing environment by the national standards for engine noise testing and proposes the targets for the construction of engine noise laboratories.
本文介绍了国家标准中内燃机噪声测试对声学测试环境的要求，提出了内燃机噪声实验室建设的指标。
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