一道美国大一声学的物理题挺基础的
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:英语作业 时间:2024/08/03 17:24:39
一道美国大一声学的物理题挺基础的
For a speaker whose sound power output is 140 dB,the distance from the speaker at which the sound level will be reduced to 96 dB is ___m.
For a speaker whose sound power output is 140 dB,the distance from the speaker at which the sound level will be reduced to 96 dB is ___m.
![一道美国大一声学的物理题挺基础的](/uploads/image/z/15216091-43-1.jpg?t=%E4%B8%80%E9%81%93%E7%BE%8E%E5%9B%BD%E5%A4%A7%E4%B8%80%E5%A3%B0%E5%AD%A6%E7%9A%84%E7%89%A9%E7%90%86%E9%A2%98%E6%8C%BA%E5%9F%BA%E7%A1%80%E7%9A%84)
你确定题目没有问题吗?我觉得这句话( sound power output is 140 dB)显然不对,因为要有了140dB时的距离这道题才有意义,它应该给出的是声源辐射出的能量.
给你一点有关decibel的资料吧:
给你一点有关decibel的资料吧: