NOISE MEASUREMENT DEVICE FOR ELECTRICAL EQUIPMENT

摘要

PURPOSE: The filter section which only the voltage signal of the fixed frequency band passes through is used. Only the created noise can measure in 24 divisions of the year facility. CONSTITUTION: A measure device of noise(100) for the electric installation comprises a noise detection unit(110), a filter section(120), a first controller(130), a second controller(140), and a output device(150). The noise detection unit changes the noise created in the electric installation into the voltage signal according to the frequency. It is connected to the noise detection unit and as to the filter section, only the voltage signal of the fixed frequency band passes through. The first controller calculates the voltage signal of the fixed frequency band as the basis as the first sound pressure value. It is connected to the noise detection unit and the second controller calculates the voltage signal of the sweep frequency as the second sound pressure value. The output device outputs the first sound pressure value. The filter section is connected to one or more bandpass filter.