Acoustic absorbing structures
AssigneeBAE SYSTEMS plc
InventorsEwan David FINLAYSON, Alastair Paul HIBBINS, John Roy SAMBLES, Gwyn RICHARDS, David PATIENCE
Life of this patent
Estimating the term…
Abstract
In some examples, an acoustic absorbing structure comprises a surface comprising an array of apertures, each aperture defining an opening for a corresponding channel, each channel forming a non-resonant acoustic attenuation structure with an axially decreasing cross-section over at least a portion of the length of the channel.
Claims17
An acoustic absorbing structure, comprising:
- a surface comprising an array of apertures, each aperture defining an opening for a corresponding channel, each channel forming a non-resonant acoustic attenuation structure with an axially decreasing cross-section over at least a portion of a length of the channel, wherein a channel further comprises a series of baffles arranged along its length, where each baffle extends inwardly from an inner surface of the channel and, the length and density of baffles increases along the length of the channel.
A platform comprising a source of low frequency acoustic noise, the platform comprising an acoustic absorbing structure so configured as to absorb or attenuate low frequency acoustic noise, the acoustic absorbing structure comprising:
- a surface comprising an array of apertures, each aperture defining an opening for a corresponding channel, each channel forming a non-resonant acoustic attenuation structure with an axially decreasing cross-section over at least a portion of a length of the channel, wherein a channel further comprises a series of baffles arranged along its length, where each baffle extends inwardly from an inner surface of the channel and, the length and density of baffles increases along the length of the channel.
Dependencies are inferred from the claim text.