gc textbook chapter 12 Sound (id: d346608c6)

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

[填空题]
In audio and communications systie 1flbbqksrq)fkvz8u2p -6 62n4q6 dems, thet h h6iz-x:d8gy3yp9u gain, $\beta$ in decibels is defined as
$\beta$ = 10log($\frac{P_{out}}{P_{in}}$)
where $P_{in}$ is the power input to the system and $P_{out}$ is the power output. A particular stereo amplifier puts out 100 W of power for an input of 1 mW. What is its gain in dB?   dB

参考答案: 50±2%


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