Determine the combined reverberant sound level and a direct sound level received by a person 5m away from the sound source of an air-condition unit to an enclosed room whose dimensions are: L=4.5 m, H = 3.6m, and W = 3 m. The floor is covered with carpet with an absorption coefficient of 0.14, the wall is made of marble with absorption coefficient of 0.01, and the ceiling is covered with acoustic ceiling board with an absorption coefficient of 0.80. Assume that the directivity factor is equal to 2. SPL=50dB

Determine the combined reverberant sound level and a direct sound level received by a person 5m away from the sound source of an air-condition unit to an enclosed room whose dimensions are: L=4.5 m, H = 3.6m, and W = 3 m. The floor is covered with carpet with an absorption coefficient of 0.14, the wall is made of marble with absorption coefficient of 0.01, and the ceiling is covered with acoustic ceiling board with an absorption coefficient of 0.80. Assume that the directivity factor is equal to 2. SPL=50dB

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.33P

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