gc textbook chapter 12 Sound (id: b311a5bf1)

本题目来源于试卷: gc textbook chapter 12 Sound，类别为 IB物理学

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The sound level 12.0 m (stu 3qf wd2buf0us::y/ ss.h;9f orm+2j4bc owj+q svhp35c from a loudspeaker, placed in the open, is 105 dB. What is the acoustic power output (W) ofsmfhsp.r +/ qo4sc oyh;+v bj3jw259c the speaker, assuming it radiates equally in all directions?    W

参考答案: 57.2±2%


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