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- W2097984247 abstract "Acoustically coupled rooms have recently been drawing more and more attention in the architecturalacoustics community. Determination of decay times in these coupled rooms fromcomputer-based models has become increasingly significant. In computational modelling ofcoupled enclosures the geometrical acoustics methods do not apply at lower frequencies, andmodels must account for the wave-nature of sound fields, especially modal effects. In thisinvestigation a combination of modal analysis with finite-difference algorithm was used topredict a decay in the sound field energy in an enclosure composed of two connected rectangularsubrooms. Random incidence absorption coefficients inside subrooms have been modifiedin this study to create different configurations of absorbing materials on subrooms walls.When one of these subrooms was much more absorbent than the other one, calculation resultshave shown that, at any frequencies, there existed both the initial sudden and the late slowdecrease in the sound field energy. This effect was characterized by two metrics: early decaytime (EDT) and late decay time (LDT) determined from a sound level decay from −50 to−60 dB. The analysis of numerical data confirmed that the most influential factor in realizingthe non-exponential sound decay is a phenomenon of eigenmodes localization." @default.
- W2097984247 created "2016-06-24" @default.
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- W2097984247 date "2014-01-01" @default.
- W2097984247 modified "2023-09-26" @default.
- W2097984247 title "Analysis of non-exponential sound decay in an enclosure composed of two connected rectangular subrooms" @default.
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