1 . 物理学中,声衰减是声波在介质中传播时其强度(声强)随着传播距离的增加而逐渐减弱的现象,划分为几何衰减、散射衰减和吸收衰减三种类型.声波的散射衰减和吸收衰减都遵从指数规律,即声强
(单位:瓦/平方米)与传播距离
(单位:米)之间有如下的函数关系:
,其中
为初始声强,
为声波的衰减系数,且
.若某声波传播
米时,声强减小了
,则声强减小
时,传播距离大约为( )(参考数据:
,
)
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A.8.5米 | B.9.0米 | C.9.6米 | D.10.2米 |
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