本文观察了 ２０、 ５０、 １００、 ３００、 ４００和１０００毫秒６种持续时间在不同压力峰值下豚鼠的听力变化。通过实验找出了持续时间和安全压力峰值之间的修正关系。当压力峰值为１４５、１５０、１５５分贝时，持续时间在５０－４０毫秒之间，持续时间每增至２倍，听阈偏移约增加３分贝，压力峰值增加５分贝，听阈偏移约增加１６－２０分贝。回归统计得出持续时间增加或减少至１０倍，豚鼠的安全压力峰值减少或增加５分贝。 In this paper, we observed the changes of hearing in guinea pigs at different pressure peaks for six durations of 20, 50, 100, 300, 400 and 1000 ms. The relationship between the duration and the peak value of safety pressure was found experimentally. When the pressure peak is 145,150,155 decibels, the duration is between 50-40 milliseconds. Each time the duration increases by 2 times, the hearing threshold shift is increased by about 3 decibels, the pressure peak is increased by 5 decibels, and the hearing threshold shift is increased by about 16 -20 dB. Regression statistics showed that the duration of the increase or decrease to 10 times the guinea pigs to reduce or increase the peak safety pressure of 5 dB.