Sound absorber element for absorber plates used for sound damping in studio and concert halls, for screening motor ways etc

摘要

The element consists of an absorber disk formed of two-circuit resonance absorbers (2), with a first foil resonance absorber circuit (4) which consists of a mechanical, parallel connection a first air volume (8) located in a first sound-proof cavity (6), forming a first spring, and an elastic foil (12) spanned over an aperture (10) of the first cavity and serving as a first damped mass. A further, second resonance absorber circuit is a Helmholtz resonator (24) connected in series before the first foil resonance absorber circuit, and provided with a further cavity (28) enclosing a further air volume (26). The foil (12) of the first foil resonance absorber circuit serves as coupling element between the first resonator and the Helmholtz resonator.