SOUND ABSORPTION MATERIAL AND SOUND ABSORPTION PANEL

• Main Authors: MABUCHI MASAKI, OBAYASHI HIROMI, TADA KOICHI
• Format: Patent
• Language: English
• Published: 26.05.2000
• Edition: 7
• Subjects: 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; ROOFS; WALLS, e.g. PARTITIONS

PROBLEM TO BE SOLVED: To improve sound absorption and obtain at least the same sound absorption characteristic as the conventional product even when it is lightweight by providing unevenness on at least one face of a plate-like sound absorption material, bringing it into contact with the neighborhood of the top of a crest making the projection part of the sound absorption material, and stretching a resin film so as to be separated from a trough making a recess part. SOLUTION: A sound absorption material comprising plate-like glass wool, rock wool or the like is provided with a shape having crests and troughs on at least one face of its surface, brought into contact with the neighborhood of the top of the crest making projection parts of its surface, and the resin film 4 of a fluororesin film or the like is stretched so as to be separated from the troughs making recess parts. The sound absorption material 1 is housed in a box body, a protection material is arranged on the front face of the sound absorption material 1 at need, and a through hole metal plate is arranged on the sound absorption face. The box body and the through hole metal plate are fixed by a press frame material to form an outer frame material so as to constitute a sound absorption panel. Thereby a propagating sound wave reaches the surface of the sound absorption material 1 through the hole of the through hole metal plate to produce sound absorption effect.