Which wall assembly will provide a higher sound transmission loss (TL):
(a)a 6- 1/2- in.- thick stud wall comprising 1- 1/2 in. × 5- 1/2 in. wood studs covered on each side with 1/2- in.- thick gypsum board or
(b)same as wall type (a)but the air space between studs is filled with fiberglass? Give reason(s)for your answer.

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The Answer of Which wall assembly will provide a higher sound transmission loss (TL):
(a)a 6- 1/2- in.- thick stud wall comprising 1- 1/2 in. × 5- 1/2 in. wood studs covered on each side with 1/2- in.- thick gypsum board or
(b)same as wall type (a)but the air space between studs is filled with fiberglass? Give reason(s)for your answer.

Which Wall Assembly Will Provide a Higher Sound Transmission Loss