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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