| 摘要 |
PROBLEM TO BE SOLVED: To improve sound absorbing efficiency with a simple structure, in a case where a Helmholtz resonator and a plate-film vibration sound absorbing structure are combined. SOLUTION: The sound absorbing structure 10 includes a case 11 and a closing member 12. The case 11 includes a hollow region and its aperture section is closed by a closing member 12. The case 11 includes a partition wall for partitioning the hollow section, and in the figure, the hollow section is divided into a first region of a circle shape, and a second section other than the first region. The closing member 12 is a vibrating plate shape or film shape member, and a hole section is provided at a position facing the second region. COPYRIGHT: (C)2010,JPO&INPIT
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