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人耳所能接收到的声波频率为20Hz～20KHz,低于20Hz的声波称为次声波。次声波具有频率低、能量大、传播距离远等特点,广泛存在于自然界、工业生产环境、交通运输环境和军事环境中,在我们生活的环境中次声广泛的存在,地震、火山爆发、工业生产、交通运输均会产生次声。次声已是生产噪声和公共噪声的重要组成部分,而次声频率若与人体器官固有频率相同,就会产生共振现象而危害人体健康,因此环境次声的测量具有重要的实际意义。
The human ear can receive the sound frequency of 20Hz ~ 20KHz, less than 20Hz sound called infrasound. The infrasound has the characteristics of low frequency, large energy and long propagation distance. It exists widely in nature, industrial production, transportation and military environment, and has widespread infrasound in the environment in which we live. Earthquakes, volcanic eruptions, industrial production , Traffic will have infrasound. Infrasound has been an important part of production noise and public noise. However, if the infrasound frequency is the same as the natural frequency of human organs, it will produce resonance phenomenon and endanger human health. Therefore, the measurement of infrasound is of great practical significance.