SOUND ABSORBING PLATE

PROBLEM TO BE SOLVED: To provide a lightweight sound absorbing plate having high sound absorbing performance. SOLUTION: In this sound absorbing plate 1, a large number of holes 3 are formed in a plate body 2 of a polymeric foam resin material from one face side to the other face side to constitute a...

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Bibliographic Details
Main Authors OGUCHI TAKASHI, MIURA AKIHISA, SEKI MASAKI, HIRAMATSU TOMOTAKA
Format Patent
LanguageEnglish
Published 27.10.2005
Edition7
Subjects
ACOUSTICS
ACOUSTICS NOT OTHERWISE PROVIDED FOR
ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTIONOF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, ORTHE LIKE
CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
FIXED CONSTRUCTIONS
METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL
MUSICAL INSTRUMENTS
PHYSICS
SOUND-PRODUCING DEVICES
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Summary:PROBLEM TO BE SOLVED: To provide a lightweight sound absorbing plate having high sound absorbing performance. SOLUTION: In this sound absorbing plate 1, a large number of holes 3 are formed in a plate body 2 of a polymeric foam resin material from one face side to the other face side to constitute a large number of closed tube air column parts. The holes constituting the large number of closed tube air column parts are made different in length. The large number of holes are formed obliquely to the extending direction of the plate body. The bulk specific gravity of the sound absorbing plate is 0.4 or less. COPYRIGHT: (C)2006,JPO&NCIPI
Bibliography:Application Number: JP20040121303