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http://dx.doi.org/10.7776/ASK.2013.32.1.043

Noise Analysis and Reduction Methods of the All-in One Window Ventilation System  

Park, Chan-Jae (Department of Architectural Engineering, Chungbuk National University)
Haan, Chan-Hoon (Department of Architectural Engineering, Chungbuk National University)
Abstract
The window ventilation system based on the heat recovery device was developed which make air ventilation possible without opening the windows. However, mechanical and aerodynamic noises were come to pass which annoyed people in rooms. In the present study, noise of new window ventilation system was measured in both general room and anechoic chamber. Also, the noise path was detected to find cause of noise generation and vulnerable area of the device. Sound absorptive and insulation materials were applied to mitigate the noise. Finally, an alternative noise control method was suggested which can satisfy with the indoor noise standards. As a result, it was shown that the cause of noise was the low transmission loss in the ventilation system. As a result, it was shown that the main noise source of the ventilation system was the blower and the major cause of noise was the low transmission loss of the ventilation system. It is also concluded that the noise levels complies with the noise standards of 40 dBA when 2 mm rubber sheet is applied inside the ventilation system.
Keywords
All-in one window-ventilation system; Machinery noise; Aerodynamic noise; Vibration; Noise reduction; Noise insulation; Noise insulation material;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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