| 摘要 |
PROBLEM TO BE SOLVED: To provide a sound deadening system capable of deadening a sound making an entry and capable of enhancing a sound absorbing effect while hardly using a fibrous sound absorbing material.SOLUTION: Louver units 22 and 35, in which acute angle parts 21 and 34 are provided in series at tips 10a of a pair of reflection surfaces 10 with damping properties, respectively, are juxtaposed in such a manner that the respective reflection surfaces 10 are arranged in an opposed state at a predetermined interval. An external incident sound incident in a predetermined range of an incident angle makes an entry into a repeated reflection lane 32 without leakage, and the sound incident upon the reflection surface 10 is deadened by being reflected and damped more than once between the reflection surfaces 10 arranged in the opposed state.SELECTED DRAWING: Figure 7 |
