Acoustic absorption structure comprising a liquid drainage system and propulsive assembly comprising such an acoustic absorption structure
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United States of America Patent
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Feb 7, 2023
Grant Date -
May 28, 2020
app pub date -
Nov 26, 2019
filing date -
Nov 28, 2018
priority date (Note) -
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Abstract
An acoustic absorption structure comprising a plurality of resonators. Each resonator comprises a first chamber which has a first mouthpiece delimited by an edge pressed against an inner surface of a porous zone of a skin so that the first chamber and the skin delimit a first cavity, a second chamber, in which is positioned the first chamber, which delimits, with the first chamber, a second cavity, at least one acoustic orifice passing through the first chamber, at least one drainage orifice passing through the first chamber and at least one drainage hole passing the second chamber, each drainage orifice and each drainage hole being configured to limit an accumulation of fluid in the resonator. Also, an aircraft propulsive assembly or an aircraft comprising the acoustic absorption structure are provided.
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