ACOUSTIC PANEL FOR AN AIRCRAFT PROVIDING NOISE ATTENUATION OVER A WIDE FREQUENCY BAND BY COMBINING TWO RESONATORS, AND ACOUSTIC PANEL MANUFACTURING METHOD
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United States of America Patent
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Issued Date -
Nov 16, 2023
app pub date -
May 3, 2023
filing date -
May 3, 2023
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Abstract
An acoustic panel for an aircraft providing noise attenuation over a wide frequency band by combining two resonators, and acoustic panel manufacturing method. The acoustic panel includes a rear skin, a cellular structure, an intermediate layer including perforations, a cellular structure, a cellular structure and a resistive skin including perforations. The acoustic panel combines quarter-wave resonators with Helmholtz resonators to provide noise attenuation over a wide frequency range.
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