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US 11,441,515 B2Granted
Sound absorber
AssigneeROLLS-ROYCE plc
InventorPaul B. Murray
Life of this patent
Estimating the term…
Abstract
A sound absorber for an engine of an aircraft, the sound absorber comprising: a base body having a bottom plate, a wall enclosing the bottom plate and an opening enabling entry of air into the base body; and a porous tongue having a fixed end connected to the wall and a free end; wherein the tongue is porous.
Claims17
A sound absorber for an engine of an aircraft, the sound absorber comprising:
- a base body having a bottom plate, a wall enclosing the bottom plate and an opening enabling entry of air into the base body;
- and
- a tongue having a fixed end connected to the wall and a free end;
- wherein the tongue is porous, and wherein the tongue has a normalised specific acoustic resistance not less than 0.5 ρc and not more than 10.0 ρc, where ρ is the density of the air and c is the speed of sound through the air.
1 more element
A sound absorber for an engine of an aircraft, the sound absorber comprising:
- a base body having a bottom plate, a wall enclosing the bottom plate and an opening enabling entry of air into the base body;
- and
- a porous tongue having a fixed end connected to the wall and a free end, wherein the tongue is bent along a longitudinal direction in an arcuate shape and wherein the tongue has a normalised specific acoustic resistance not less than 0.5 ρc and not more than 10.0 ρc, where ρ is the density of the air and c is the speed of sound through the air.
Dependencies are inferred from the claim text.