.~> Absorbing material behind foraminous facing sheet
DEFINITION
Classification: 52/144
(under the class definition) Structure which in the completed construction presents an exposed, i.e., visible, face having a defined physical configuration peculiar to the attenuation of sound.
(1) Note. Mere definition of a material, e.g., fibrous, porous, rock wool, etc., is not a definition of a physical configuration and such subject matter classified elsewhere in this class on other features, and see the references herein after under "Search Class".
SEE OR SEARCH THIS CLASS, SUBCLASS:
17, for an insulated car roof.
167.1+, for means compensating earth- transmitted force, e.g., earthquakes.
238.1+, for a resilient spacer, holding a partition from a barrier, which may act to absorb sound waves.
347, for a member isolating a backing from support. 380+, for a cast in situ barrier having an isolated space filled with insulated material.
393+, for a component separated by a relatively yieldable spacer.
404.1+, for a construction with a nonsettable insulating material within a cavity.
573.1, for a structure having means accommodating dimension variation responsive to changing conditions, which means may also act as buffer to sound waves.
SEE OR SEARCH CLASS
181, Acoustics, particularly
30, and 290+ for a sound deadening unit, per se, even though it may be made of multiple layers, i.e., not including features for a building structure combination.
