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

Q. 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.

1. 15
2. 30
3. 45
4. 90

Ans: 30 dB

Explanation: Sound level in the source side