The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the listening

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The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the listening position increases from 23 to 61 dB. What is the ratio of the final sound intensity to the original sound intensity?
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Physics

ISBN: 978-1118486894

10th edition

Authors: David Young, Shane Stadler

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