Question

If you were trying to build a soundproof 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? A. Wood B. Carpet C. Heavy curtains D. Concrete

Answer 1

I would say D. Concrete. It has more molecules packed together in a square shape...The tighter the molecules, the less sound waves that are able to travel through the medium.

Answer 2

Coefficients of Absorption for Common Materials

(from Penn Foster) ⭐⭐⭐⭐⭐

Material Coefficient of Absorption

Perforated acoustic ceiling material 60%

Heavy curtains (C) 50%

Carpeting (B) 20%

Wood (A) 5%

Plaster 3%

Clay tile 3%

Concrete (D) 2%

The answer is C. Heavy curtains ✅