Static structures (e.g. – buildings) – Stepped; e.g. – stair
Patent
1997-01-17
1998-08-04
Aubrey, Beth
Static structures (e.g., buildings)
Stepped; e.g., stair
52144, 52188, 181285, E04F 1100
Patent
active
057876568
ABSTRACT:
Acoustical seating risers for indoor arenas are made of a plurality of pre-formed units of L-shaped cross-section. These L-shaped sections are mounted atop one another on a separate pre-formed foundation to provide a mounting platform for rows of seats and additional acoustical steps in the aisles. Each riser unit includes an integrally molded acoustical element having a slit and recessed chamber or a series of slits and recessed chambers designed to absorb low frequency sounds below 500 Hz, thus permitting balancing of the frequency response within that range. Riser units are assembled together in an overlapping fashion to form the sealed and slitted cavities and protect the recessed chamber or series of chambers from water or other contamination.
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Aubrey Beth
RPG Diffusor Systems, Inc.
Spiegel H. Jay
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