gc textbook chapter 12 Sound (id: 223756b40)

本题目来源于试卷: gc textbook chapter 12 Sound，类别为 通用国际物理

[填空题]
A single mosquito 5.0 m .;9mm6vtwgj j from a person makes a,q) u3lvwtf i: sound close to the threshold of human hearing (0 dB). What will be the sound level of 1000 such mout l)v,3fi wq:squitoes?    dB

参考答案: 30±2%


本题详细解析:

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