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。
One of the spectrum analysis methods suitable for speed information analysis in the noise radar signal is also introduced.
文章还介绍了一种适合于分析噪声雷达信号中目标速度信息的谱分析方法。
In this paper, spectrum analysis is carried out for 4102Q diesel engine to investigate the effect of parameters adjustment on noise emission, and to determine its noise sources.
本文通过对4102Q型柴油机噪声的频谱分析与研究，了解该型柴油机参数调整对噪声的影响；
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