Angle independent acoustic structures for broadband sound absorption and sound transmission loss
AssigneesToyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki Kaisha
InventorsXiaoshi Su, Debasish Banerjee, Tomohiro Miwa, Miki Nakahara, Reimi Emoto, Mizuki Sakamoto, Toyohiro Sone
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Abstract
An acoustic structure includes at least one acoustic scatterer that is angle independent and has multiple resonant frequencies. Each acoustic scatterer contains at least one repeated cell. Each cell contains at least two distinct resonant channels capable of absorbing sound and improving sound transmission loss at distinct frequencies. Each resonant channel is identical to at least one other channel within the acoustic scatterer.
Claims16
An acoustic structure comprising:
- an acoustic scatterer comprising a plurality of triangular prism shaped repeating cells with a corresponding plurality of distinct resonant channels positioned about a central axis of the acoustic scatterer such that the acoustic scatterer is an angle independent broadband acoustic absorber.
An acoustic structure comprising:
- a plurality of acoustic scatterers each comprising a plurality of triangular prism shaped repeating cells with a corresponding plurality of distinct resonant channels such that the plurality of acoustic scatterers are angle independent broadband acoustic absorbers.
An acoustic structure comprising:
- a cylindrical shaped acoustic scatterer;
- and
- two cover plates attached to opposing ends of the cylindrical shaped acoustic scatterer, the cylindrical shaped acoustic scatterer comprising a plurality of triangular prism shaped repeating cells positioned about a central axis of the cylindrical shaped acoustic scatterer such that the cylindrical shaped acoustic scatterer is an angle independent broadband acoustic absorber.
Dependencies are inferred from the claim text.