Cause and perception of amplitude modulation of heavy-weight impact sounds in concrete wall structures
- Title
- Cause and perception of amplitude modulation of heavy-weight impact sounds in concrete wall structures
- Author
- 박준홍
- Keywords
- Heavy-weight floor impact sound; Amplitude-modulation; Concrete wall construction; Sound perception
- Issue Date
- 2015-10
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Citation
- BUILDING AND ENVIRONMENT, v. 94, Page. 785-792
- Abstract
- This study investigated amplitude-modulation effects on the heavy-weight floor impact sound caused by a vibration of concrete wall construction. The fundamental resonance of a floor in concrete wall construction consists of two closely spaced vibration modes. These modes were identified from experimental modal analysis of an actual multi-story building. The modes corresponded to in-phase and out-of-phase vibrations of the upper and lower floors. The rigidity of the side walls had influence on the difference between the natural frequencies of the two modes. Low-frequency modulated sounds were generated in a room by the simultaneous excitations of the two vibration modes. The heavy-weight impact sounds were analyzed using auditory experiments to determine the amplitude-modulation effects on the perceived annoyance. The highly modulated impact sounds were judged to be 3-5 dB more annoying than the one having the same level without modulation. Consequently, impact sound transmission from floors connected by less rigid side walls exhibited lower annoyance. (C) 2015 Elsevier Ltd. All rights reserved.
- URI
- http://www.sciencedirect.com/science/article/pii/S0360132315001869?via%3Dihubhttp://hdl.handle.net/20.500.11754/28243
- ISSN
- 0360-1323; 1873-684X
- DOI
- 10.1016/j.buildenv.2015.04.020
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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