Question

The sound insulation of plastered solid brick masonry walls varies as __________

(a) Weight per unit volume

(b) Weight per unit area

(c) Log of weight per unit volume

(d) Log of weight per unit area

I had been asked this question in a national level competition.

The question is from Acoustics topic in section Acoustics and Ventilation of Construction & Building Materials

Answer 1

Correct option is (d) Log of weight per unit area

Best explanation: The sound insulation of plastered solid brick masonry walls varies as the log of weight per unit area. The sound insulation of all the other non-porous homogeneous rigid partitions varies in the same way.