Noise+Control

Noise Control[[image:wall1.jpg align="right"]]
__Efficiency__ - Reduction of noise generation at the source by proper selection & instalation Equipment - Reduction of noise transmission from point to point - Reduction of noise at the receiver

Using a 18" double brick wall to convert theater acoustical energy into a less disturbing form of energy __Masonry Wall Properties__

Wall Designation - **W23** Tickness- **18"** Weight - **120 lb/sq.ft** STC- **62**



__Noise Reduction__

NR= TL -10 log (S/ Ar)

TL- Barrier transmission loss (@500 dB)= **58** S- Area of the barrier = L27ft x H23ft = **621sq. ft** Ar- Total absorption of the receiving room (sabins) = **2253**

@500dB Ar= Floor 1437sq.ft (.57) = 819.09 Seats 682sq.ft (.88) = 600.16 Walls 3059sq.ft (.03) = 91.77 Doors 96sq.ft (.09) = 8.64 Ceiling 1437sq.ft (.51) = 732.87 Ar = **2252.47**

NR=TL-10log(S/ Ar) = 58-10log(621/ 2253) = **63.6**

@ 500db the Wall Transmission Loss is 58,the original value applied