Through contrasting and analyzing, the particle vibration velocity were forecasted by the orderliness formula of attenuation of blasting earthquake wave is precise relatively.
经对比分析，所得爆破地震波衰减规律公式预测的质点振动速度具有较高的精度。
As the expansion device of amplitude, horn is used to focus energy and enlarge the mechanical vibration of the particle displacement or velocity.
变幅杆作为振幅扩大装置，主要作用是把能量集中，将机械振动的质点位移或速度放大。
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