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 largest. B. 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. 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 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.

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briana9697 briana9697

13-02-2018
Biology

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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 largest. B. 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. 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 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.

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The correct answer is C.
The coefficient of absorption of a material refers to the value that is obtained when the absorbed sound intensity is divided by the incident sound intensity. The absorption coefficient typically range from zero to one. Coefficient absorption of zero mean that no absorption occur while the value of one implies that 100% of the sound is absorbed. Thus, a material with a value of 62% coefficient absorption will absorb more sound compared to materials which have 30% and 47%. This is because, the value of energy in the incident wave that remain in the reflected wave for this material is the lowest.