page_title: Acoustic liner
hierarchical_section_title: Acoustic liner
caption_attribution_description: English: A composite sandwich acoustic liner (A) with perforate face-sheet (B) honeycomb core (C) and back-skin (D)
context_page_description: Aircraft engines, typically turbofans, use acoustic liners to damp engine noise. Liners are applied on the internal walls of the engine nacelle, both in the intake and by-pass ducts, and use Helmholtz resonance principle for the dissipation of incident acoustic energy.
context_section_description: Aircraft engines, typically turbofans, use acoustic liners to damp engine noise. Liners are applied on the internal walls of the engine nacelle, both in the intake and by-pass ducts, and use Helmholtz resonance principle for the dissipation of incident acoustic energy.
caption: A composite sandwich acoustic liner (A) with perforate face-sheet (B) honeycomb core (C) and back-skin (D)
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