Back to results
US 4,842,097 AGranted
Sound absorbing structure
OwnerWoodward Bruce, William Millerinventors
Life of this patent
Estimating the term…
Abstract
A sound absorbing structure is formed of adjacent panels which provide narrow slots opening into first resonance cavities formed behind the panels. Support strips provide secondary cavities between adjacent first cavities to reduce acoustical coupling between adjacent first cavities. The resulting sound absorbing structure provides substantial sound absorption at frequencies of less than about 1,000 Hz.
Claims15
A sound absorbing structure to be located over a supporting surface comprising:
- a plurality of adjacent panels fabricated of a substantially solid material, the panels being disposed in generally edge-by-edge relationship to each other and spaced from each other such that the adjacent side edges of adjacent panels define a slot therebetween;
- a panel supporting bracket attached to each of the panels between adjacent slots such that when the panels are located over the supporting surface the panels, the support surface, and the brackets cooperate to define first acoustical cavities between adjacent brackets with each slot in air flow communication with a different one of the first acoustical cavities, and each bracket defines a second acoustical cavity;
- sound absorbing insulation material inside the second cavities;
- and
- apertures formed in the mounting brackets establishing communication between the first and second cavities whereby reflected sound waves enter said second cavity from said first cavity to be absorbed by the sound absorbing material therein.
2 more elements
A sound absorbing structure comprising:
- a plurality of adjacent panels fabricated of a substantially solid material, the panels being disposed in generally edge-by-edge relationship to each other and spaced from each other such that the adjacent side edges of adjacent panels define a slot therebetween;
- a continuous back wall spaced to the back side of the plurality of panels;
- panel support brackets disposed between the panels and the back wall and located between adjacent slots, the brackets interconnecting the panels and the back wall such that the panels, back wall, and brackets cooperate to define first acoustical cavities between adjacent brackets with each slot in air flow communication with a different one of the first acoustical cavities, and each bracket defines a second acoustical cavity;
- sound absorbing insulation material inside the second cavities;
- apertures formed in the mounting brackets establishing air flow communication between the first and second cavities whereby reflected sound waves enter said second cavity from said first cavity to be absorbed by the sound absorbing material therein;
- and,
- sound absorbing insulation material at the interface of the brackets and the panels.
4 more elements
A sound absorbing structure to be located over a supporting surface comprising:
- a panel fabricated of a substantially solid material;
- at least one elongated slot formed in the panel and extending longitudinally of the panel, the slot being shorter in length than a longitudinal length of the panel such that ends of the slot are at a distance from opposite longitudinal ends of the panel;
- a pair of panel supporting brackets attached to the panel and located to either side of the slot such that when the panel is located over the supporting surface the panel, supporting surface, and pair of panel supporting brackets cooperate to define a first acoustical cavity with the slot open to the first cavity, and each one of the pair of brackets define a second acoustical cavity;
- sound absorbing insulation material inside each of the second cavities;
- apertures formed in the mounting brackets for establishing communication between the first cavity and the second cavities whereby reflected sound waves enter said second cavity from said frist cavity to be absorbed by the sound absorbing material therein;
- and,
- sound absorbing insulation material located at the interface of the brackets and the panel.
4 more elements
Dependencies are inferred from the claim text.