Acoustic panel

The invention provides an acoustic panel which improves the yield strength while maintaining the sound absorption. The permissible stress of the perforated plate is A (surface multi-orifice plate (2a), and an internal multi-orifice plate). The load on the multi-orifice plate (2) is p0, and the coeff...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	ICHIRO YAMAGIWA
Format:	Patent
Sprache:	eng
Schlagworte:	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
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