Question

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 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.
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 largest.
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 largest.

Answer 1

The right answer for the question that is being asked and shown above is that: "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 smallest."

Answer 2

Answer: The correct answer is Option C.

Explanation: For a room to be soundproof, there should be minimum reflection of the sound waves and maximum absorption of the waves.

According to the question, the coefficient of absorption is maximum for Sample C. So, this sample will reflect minimum waves and will absorb maximum waves.

Hence, this sample is the best for making the room soundproof. Hence, the correct answer is Option C.