Innovative acoustic liner technology for the aerospace
Designers of new aircraft engines aim to reduce noise emissions to maximise efficiency and increase the competitiveness of the aerospace sector. Ultra-high bypass ratio engine technologies represent significant challenges for the design of acoustic treatments. These turbofan engines are expected to equip the next generation of aircraft leading to lower frequencies than existing engine technologies. The EU-funded SALUTE project will apply an innovative approach by developing a new acoustic liner technology based on arrays of small loudspeakers or passive membranes. The technology will deliver excellent sound absorption at low frequencies while remaining sufficiently small to adjust to thin nacelle geometries.