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- W38847145 abstract "Polyurethane multi-layer and foam multi-layer were prepared with PU1000 and PU2000 made by poly(propylene glycol) (PPG) having the molecular weight of 1000 and 2000 g/mol, respectively. The damping and transmission loss of these materials were compared with PU1000 used as a reference. The damping peak of polyurethane multi-layer was shifted to the lower temperature compared with PU1000, while the damping peak of polyurethane foam multi-layer was shifted to the higher temperature and broaden. In terms of noise reduction, the transmission loss of polyurethane multi-layer was effective at the specific frequency range such as less than 100 Hz and around 600 Hz compared with PU1000. The transmission loss of polyurethane foam multi-layer was most effective in the whole experimental frequency range." @default.
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- W38847145 date "2005-01-01" @default.
- W38847145 modified "2023-09-23" @default.
- W38847145 title "Damping and Transmission Loss of Polyurethane Multi-Layer" @default.
- W38847145 hasPublicationYear "2005" @default.
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