Sound attenuating structure

Details Sound attenuating structure Sound attenuating structure

E - Fixed Constructions

06

B

E06B 5/20 (2006.01) G10K 11/16 (2006.01) G10K 11/162 (2006.01)

Patent

CA 2173811

Sound attenuating structure. The structure includes spaced apart first and second stiffened metal panels connected through a spring connection to form a sealed cavity therebetween. The stiffened panels include a geometric grid pattern of stiffening members forming triangular areas selected to eliminate panel resonances below approximately 1500 Hz. A sound attenuating material is disposed within the cavity to dampen higher frequency resonances. In one embodiment, the structure includes a septum disposed between the first and second metal panels. A preferred sound attenuating material disposed within the cavity is rock wool.

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