Question

In rigid homogeneous walls, the transmission loss of a one-brick wall is _________

(a) 10 dB

(b) 20 dB

(c) 50 dB

(d) 70 dB

I had been asked this question by my school principal while I was bunking the class.

Question is from Acoustics in portion Acoustics and Ventilation of Construction & Building Materials

Answer 1

Right option is (c) 50 dB

Best explanation: In rigid homogeneous walls, the transmission loss of a one-brick wall is 50 dB. The transmission loss of a one and a half brick thick wall is 53 dB and that of a half brick thick wall having 13 mm thick plaster on both sides is 45 dB.