Question

Insulation of __________ over a base concrete floor is obtained by using resilient surface material on floors.

(a) 1-5 dB

(b) 5-10 dB

(c) 12-15 dB

(d) 17-25 dB

This question was posed to me in a national level competition.

I would like to ask this question from Acoustics in section Acoustics and Ventilation of Construction & Building Materials

Answer 1

Right option is (b) 5-10 dB

Explanation: An insulation of 5-10 dB over a base concrete floor is obtained by using resilient surface material on floors. It consists of providing soft floor finish over a thin concrete screed provided as the R.C.C. slab.