Thermal/acoustic specialist 3M introduced a new acoustic demonstrator from its subsidiary E-A-R Thermal Acoustic Systems (Booth No. N5930) here at the NBAA convention. The demonstrator was created to simulate not only interior noise levels of a typical business aircraft, but also the range of noise signatures with varying frequency content.
A new thermal/acoustic barrier package promises to reduce cabin noise by as much as 30 percent. The Silentium Air SPS 360 is a product of Aviation International Management Services (AIMS) of Montreal, which is supplying the kits to exclusive marketing agent Zenith Jet, also of Montreal.
Broadband cabin noise, which can greatly fatigue passengers in even the most finely appointed business aircraft, could be a thing of the past if a new system from Britain’s Ultra Electronics and Qinetiq makes it to market. Early next year the partners are expecting to flight test new-generation hybrid active/passive mounts positioned between the fuselage and cabin trim panels.
Noise is everywhere–annoying, tiring and sometimes painful. Since the early days of aviation, when a roaring, clattering engine sat on a wooden frame close to the pilot, and the wind whistled through the wire bracing like a banshee chorus, engineers have sought to make the process of manned flight less noisy. And they have succeeded, to a degree.
U.S. and European Union officials are making last-ditch efforts to negotiate a settlement to their long-running dispute over hush kits bringing Stage 2 aircraft into compliance with current Stage 3 noise limits. Both sides want the deeply divisive matter resolved at the September 25 meeting in Montreal of the International Civil Aviation Organization assembly.