Soundproofing Q 2.3 The noise level from a source outside a building is 86 dB(A). The wall material has a TL loss of 10 dB(A). A glass window has a TL of 5 dB(A). The total wall area is 50 m2. The wall has three windows, each with dimensions of 1.5 m x 2.6 m. Calculate the noise level inside the building, and the effective transmission loss. Select one: O a. 77.8 dB(A), 8.2 dB(A) O b. 75.8 dB(A), 7.2 dB(A) O c. 71.8 dB(A), 5.2 dB(A) O d. 73.8 dB(A), 6.2 dB(A)