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A room is separated by a partition wall. The average intensities of sound in the source and receiving sides across the partition are 10– 4 W/m2 and 10– 7 W/m2 respectively. The transmission loss (TL) of the partition wall is _______ dB.
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- 15
- 30
- 45
- 90
Correct Option: B
Sound level in the source side
= 10 log | = 80 dB | |||
10-12 |
Sound level in the receiver’s side
= 10 log | = 50 dB | |||
10-12 |
Transmission loss due to the partition wall = (80 – 50) dB = 30 dB