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Architecture and Planning Miscellaneous-topic

Architecture and Planning Miscellaneous

  1. 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
Correct Option: B

Sound level in the source side

= 10 log
10-4
= 80 dB
10-12

Sound level in the receiver’s side
= 10 log
10-7
= 50 dB
10-12

Transmission loss due to the partition wall = (80 – 50) dB = 30 dB



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