67. The sound wave has passed through the barrier, so t

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Uploaded: 27.10.2015
Content: fiz050_67.doc (52 kB)

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67. The sound wave has passed through the barrier, so that levels of Lp sound intensity decreased by 30 dB. How many times has decreased the intensity I sound?

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Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)

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