Question

If you were trying to build a sound proof room, which of the following materials would you choose in order to absorb the most sound, based on the coefficient of absorption for each material

Answer 1

Coefficients of Absorption for Common Materials

(from Penn Foster) ⭐⭐⭐⭐⭐

Material Coefficient of Absorption

Perforated acoustic ceiling material 60%

Heavy curtains (A) 50%

Carpeting (B) 20%

Wood (C) 5%

Plaster 3%

Clay tile (D) 3%

Concrete 2%

The answer is A. Heavy curtains ✅

Answer 2

Answer: concrete

Explanation: because of the absorption