He found that the length of time it takes a sound's echo to decay is determined by the absorption of the sound's original energy by surrounding material.
他发现，声音回声衰减的时间长短取决于周围物质对声音原始能量的吸收。
Then the different damped oscillation curves and over-damped monotonic decay curves can be obtained for various diameter and length of the pressured tube and various volume of the chamber.
对于不同的传压管径、传压管长度和腔室容积，得到不同阻尼的衰减振荡曲线以及过阻尼时呈单调衰减的回零过程曲线。
The results indicate that the decay coefficient of the peak value of blast wave with the distance will be reduced as the hole depth (charge length) is increased.
计算表明，炮孔深度(装药长度)增大，爆炸应力波峰值随距离的衰减指数减小。
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