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Your boss asks you to design a room that can be as soundproof as possible and provides you with three samples of material. The only information on each sample's label is the material's coefficient of absorption. The coefficient of absorption listed on Sample A is 30%, on Sample B is 47%, and on Sample C is 62%. When your boss asks for your choice and the reasoning behind it, what would you tell him? A. Sample A would be best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest. B. Sample A would be best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the largest. C. Sample C would be best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest. D. Sample C would be best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the largest.

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6 votes
The correct answer will be option D

Sample C would be best choice to design a room that can be as soundproof as possible. The reasoning behind it is that with its 62% coefficient of absorption, the percentage of the energy in an incident wave that would remain in a reflected wave from this sample is the largest.
User Matthias Langer
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