gc textbook chapter 12 Sound (id: 93c685af6)

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 cassette player is ubna:p3x-qo (bb7esx, ) q-5q/vv lje c*p tu0db2otvo+, ie6 said to have a signal-to-noise ratio of 58 dB, whereas for a CD player it is 95 dB. What is the ratio of intensities of the signal and the background noise fove b,6dup2c +itt 0oo*r each device? 58 dB =    $ \times10^{ 5}$ dB =    $ \times10^{9 }$

参考答案:
空格1: 6.3±2%  空格2: 3.2±2% 


本题详细解析:

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