Long Elastic Open Neck Acoustic Resonator for low frequency absorption

Volume: 421, Pages: 1 - 16
Published: May 1, 2018
Abstract
Passive acoustic liners, used in aeronautic engine nacelles to reduce radiated fan noise, have a quarter-wavelength behavior, because of perforated sheets backed by honeycombs (with one or two degrees of freedom). However, their acoustic absorption ability is naturally limited to medium and high frequencies because of constraints in thickness. The low ratio “plate thickness/hole diameter” generates impedance levels dependent on the incident...
Paper Details
Title
Long Elastic Open Neck Acoustic Resonator for low frequency absorption
Published Date
May 1, 2018
Volume
421
Pages
1 - 16
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