A room 3 m X 6 m X 10 m has walls of average absorptivity 0.05. The floor is covered with a rug (a = 0.6), and the ceiling is wood (a = 0.1). ( a ) Calculate the average absorptivity. (b) Calculate the reverberation time from (12.3.4). (c) Calculate the reverberation time from (12.4.2) and compare with the answer to (b).
A room 3 m X 6 m X 10 m has walls of average absorptivity 0.05. The floor is covered with a rug (a = 0.6), and the ceiling is wood (a = 0.1). ( a ) Calculate the average absorptivity. (b) Calculate the reverberation time from (12.3.4). (c) Calculate the reverberation time from (12.4.2) and compare with the answer to (b).
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A room 3 m X 6 m X 10 m has walls of average absorptivity 0.05. The floor is covered
with a rug (a = 0.6), and the ceiling is wood (a = 0.1). ( a ) Calculate the average
absorptivity. (b) Calculate the reverberation time from (12.3.4). (c) Calculate the
reverberation time from (12.4.2) and compare with the answer to (b).
Transcribed Image Text:Ꭲ
=
0.161 V
-
— S ln (1 – āɛ)
(12.4.2)
-
Transcribed Image Text:0.161V
T =
(12.3.4)
Sā
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