POROUS SOUND-ABSORBING BOARD

• Main Authors: YAMAGUCHI Zenzo, YAMAGIWA Ichiro
• Format: Patent
• Language: English; French; Japanese
• Published: 01.06.2017
• 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; BUILDING; CEILINGS; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; FIXED CONSTRUCTIONS; FLOORS; GENERAL BUILDING CONSTRUCTIONS; INSULATION OR OTHER PROTECTION OF BUILDINGS; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; MUSICAL INSTRUMENTS; PERFORMING OPERATIONS; PHYSICS; ROOFS; SOUND-PRODUCING DEVICES; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR; WALLS, e.g. PARTITIONS

The present invention can improve, by coating, the sound-absorbing properties of a porous board, rather than merely avoiding degradation in sound-absorbing properties. A porous sound-absorbing board (1) has a plurality of through-holes (4). A coating film (7, 7a) is provided on the inner wall surfaces of the through-holes (4) of a porous board (6) that serves as a base material for forming the porous sound-absorbing board (1), and the coating films (7, 7a) form through-hole sections (8) having a volume smaller than that of the through-holes (4). L'invention permet d'améliorer les propriétés d'insonorisation d'une plaque poreuse au moyen d'un revêtement au lieu d'éviter simplement une dégradation des propriétés d'insonorisation. Une plaque insonorisante poreuse (1) comprend plusieurs trous traversants (4). Des films de revêtement (7, 7a) sont prévus sur les surfaces des parois internes des trous traversants (4) d'une plaque poreuse (6)) qui sert de matériau de base pour former la plaque insonorisante poreuse (1). De plus, les films de revêtement (7, 7a) forment des sections de trous traversants (8) dont le volume est plus petit que celui des trous traversants (4). 吸音性能の悪化回避ではなく、塗装により多孔板の吸音性能の向上を図ること。　多数の貫通孔（４）を有する多孔吸音板（１）である。多孔吸音板（１）を構成する母材としての多孔板（６）の前記貫通孔（４）の内壁面に塗膜（７，７ａ）を有し、この塗膜（７，７ａ）により貫通孔（４）の容積よりも小さな容積の貫通孔部（８）を形成している。