Tunable acoustic attenuation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 4, 2017
Grant Date -
Nov 17, 2016
app pub date -
May 13, 2016
filing date -
May 14, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An acoustic attenuation device extends from a first end to a second end and includes first and second sheets. A plurality of webs positioned between the first and second sheets cooperates with the first and second sheets to form a series of sound attenuation chambers containing a volume and mass of fluid. A first panel secured to the sheets closes the chambers at the first end of the device. A second panel secured to the sheets closes the chambers at the second end of the device. The device further includes first and second openings associated with each chamber and through which excited fluid resonates. The first and second openings extend through the first sheet into each chamber. The first openings have an invariable cross-section. At least one of the second openings has an adjustable cross-section for varying a resonant frequency of the chamber.
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