Results of identification and analysis show that main noise source of the model GZ6921 bus is cooling fan.
识别及分析结果表明，冷却风扇噪声是GZ 6921型客车的主要噪声源。
Through measurement and analysis of sound signals, the trouble source can be accurately detected and its type analyzed under strong noise environment.
通过检测及分析声音信号，可以在强噪声环境下准确地探测到故障源并分析出其故障类型。
In order to control the noise of the indoor unit of an embedded air conditioner, the main source of the noise is identified by using separate running and noise spectrum analysis.
为了控制内藏式空调室内机的噪声，运用分步运转、频谱分析等方法判断出主要噪声源。
Sound and vibration analysis can fully identify the source of noise, thus controlling the noise accordingly.
声振分析能从根本上弄清结构产生噪声的根源，从而有针对性地对噪声进行控制。
Through theory computation and analysis, the source of noise and transfer paths corresponding to every noise peak value are confirmed, the main aim to decreasing noise is pointed out.
通过理论计算和分析确定了噪声频谱图中各噪声峰值对应的噪声源及其传递路径，指明了压缩机降噪的主要目标。
Through the analysis of experimental model and air dynamic of type MB503 wood surface planer, and chief noise source was fixed, and was verified by the experiment.
通过对MB503型木工平刨床进行试验模态和空气动力学的分析，确定了木工平刨床的主要噪声源，并进行了实验验证。
Through noise data collection and power spectrum analysis of turbojet and turbofan, the main noise source and characteristics of noise are discussed.
通过对涡轮喷气及涡轮风扇发动机试车噪声的采集和声功率谱分析，讨论发动机的主要噪声源和噪声的特征。
An analysis of a passive seismic method for subsurface imaging is presented in which ambient seismic noise is employed as the source of illumination of subsurface scatterers.
本文提出用于地下成像无源地震方法的分析，在该方法中应用环境地震噪声作为地下散射体的照明源。
Both theoretical analysis and numerical simulations demonstrate that the proposed system is of better security and high precision for recovered source signals even when channel noise is very high.
无论是理论分析和数值模拟结果表明，该系统是更好的安全性和高精确度恢复的源信号，即使当信道噪声是非常高的。
By means of the techniques of noise field analysis and spectrum analysis, the noise inside a light bus was measured and analyzed, and the main noise source was identified.
本文利用声场分析技术和谱分析技术对轻型客车的车内噪声进行了测试分析，识别出车内噪声的主要噪声源。
In this paper the main noise source of SQ6450 type light car was judged by means of spectrum and correlation analysis of noise signal. The corresponding proposal reducing noise was presented.
对SQ 6450轻型汽车进行了噪声测试，通过对噪声信号的频谱分析和相干分析，找出了主噪声源，并提出了降噪措施。
This paper distinguishes principal noise source of the hoist, it is passed through-noise experiment and frequency analysis with the hoist.
本文通过对提升绞车的噪声试验和频谱分析，鉴别了提升绞车的主要噪声源。
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。
In this paper, the theory and the experimental technique about the identification of a noise source using a cross-spectrum analysis method have been studied.
本文研究了互谱分析法在噪声源定位应用上的理论和实验技术。
Based on the analysis of vibration source, vibration transmission path and transmission characteristics, the methods of vibration isolation and noise reduction are decided.
通过分析振动的来源以及振动传递的路径和传递特性，确定了隔振降噪的方法。
The method makes the position analysis of the static sound source simpler and more intuitive, and provides a more accurate evidence for further noise-reducing work.
本发明方法使静态声源的定位分析更加简单直观，为进一步的降噪工作提供了更准确的依据。
The source of noise in the high pressure plunger pump is identified through frequency spectrum analysis and measurements show significant reduction of noise in the improved plunger pump.
基于高压柱塞泵噪声产生的机理分析与振动频率的计算，找出产生噪声的根源；对实验测得频谱曲线进行频谱分析表明，改进后的高压柱塞泵的噪声得到了明显地改善。
The source of noise in the high pressure plunger pump is identified through frequency spectrum analysis and measurements show significant reduction of noise in the improved plunger pump.
基于高压柱塞泵噪声产生的机理分析与振动频率的计算，找出产生噪声的根源；对实验测得频谱曲线进行频谱分析表明，改进后的高压柱塞泵的噪声得到了明显地改善。
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