Wave amplitude decay in different ways by downward compressive wave and upward wave, the upward wavedecay slower than the downward wave.
下行压缩波与上行波衰减规律不同，其中上行拉力波比下行波衰减快；上行压缩波比下行波衰减慢。
2
This paper analyses the sound decay in an acoustically treated rectangular space from the view point of wave acoustics. and a new method of calculating complex eigenvalue is given.
本文从波动声学观点出发，分析了矩形水池中声能的衰变，给出了一种解算复本征值的新方法。
3
The blasting vibration of creep mass slope of Longtan hydropower station is observed, interpreted and analyzed. The experiential formula of decay for the blasting earthquake wave is obtained.