PERFORATED PLATE

This perforated plate is disposed so that air layer is formed between plate-shaped or wall-shaped blocking components and the perforated plate, and has a number of through holes. A through hole has the maximum diameter portion formed on one surface of the perforated plate and the minimum diameter po...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YAMAGUCHI, Zenzo, YAMAGIWA, Ichiro
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PERFORMING OPERATIONS PHYSICS SOUND-PRODUCING DEVICES TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
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Beschreibung
Zusammenfassung:	This perforated plate is disposed so that air layer is formed between plate-shaped or wall-shaped blocking components and the perforated plate, and has a number of through holes. A through hole has the maximum diameter portion formed on one surface of the perforated plate and the minimum diameter portion formed on the other surface of the perforated plate. The through hole expands outward from a straight line connecting the maximum diameter portion and minimum diameter portion in cross-sectional view along the thickness direction of the perforated plate.