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简单评价一台电机噪声的大小,测出它的总声级就够了。但如果想要降低它的噪声就必须对电机中各类噪声源进行鉴别,以便“对症下药,药到病除”。鉴别的一般步骤如下: 1.测出电机噪声的频谱。这时倍频程频谱也显得较粗略。最好采用百分带宽甚至恒定带宽的窄带频率分析仪(如丹麦B.K.
A simple assessment of the size of a motor noise, measured its total sound level is enough. But if you want to reduce its noise, you must identify all kinds of noise sources in the motor in order to “prescribe the right medicine and cure the disease.” The general steps of identification are as follows: 1. Measure the spectrum of motor noise. Octave spectrum at this time also appears to be more sketchy. It is best to use a narrowband bandwidth or constant bandwidth narrowband frequency analyzer (such as the Danish B.K.