| 摘要 |
PROBLEM TO BE SOLVED: To provide noise absorbing equipment which has high sound absorbing performance and high sound insulating performance and exhibits effective sound absorption effect for mainly a frequency to be cosidered. SOLUTION: The sound absorbing equipment 60 includes a corrugated partition plate 52 having a wave-shaped section, a 2nd partition plate 53 which is provided in a direction crossing the corrugated partition plate 52 and partitions an air part extending in sectional view direction (Y-axial direction) of the wave-shaped section of the corrugated partition plate 52, and a sound absorber 51 which is provided covering the partitioned air part from above (in a -Z direction) to form an air layer 70 of specified thickness in between the corrugated partition plate 52. COPYRIGHT: (C)2004,JPO
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