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小野測器-騒音計とは (page2)
![デシベルとは[dB] 対数関数の実用例～制御工学の基礎あれこれ～](https://taketake2.com/ne1028.png "デシベルとは[dB] 対数関数の実用例～制御工学の基礎あれこれ～")
デシベルとは[dB] 対数関数の実用例～制御工学の基礎あれこれ～
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