Noise

March 19, 2008 - 5:38am

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.

February 8, 2008 - 10:14am

Cabin entertainment provider Rosen Aviation and cabin completion and refurbishment specialist Elliott Aviation have joined forces to create a noise-canceling solution combined with an in-flight entertainment system for the King Air 200, 300 and 350. Elliott’s sound management system incorporates UltraQuiet active noise control.

February 8, 2008 - 10:14am

Cabin entertainment provider Rosen Aviation and cabin completion and refurbishment specialist Elliott Aviation have joined forces to create a noise-canceling solution combined with an in-flight entertainment system for the King Air 200, 300 and 350. Elliott’s sound management system incorporates UltraQuiet active noise control.

January 8, 2008 - 10:51am

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.

November 27, 2007 - 9:51am

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.

November 7, 2007 - 10:30am

The European Union’s research program on noise reduction, Silence(r), officially ended in June with promising results. It explored all noise sources, from engines to landing gear and flaps. However, although it achieved a reduction of five decibels in aircraft noise, several more leads need to be developed to reach the ambitious target of cutting a full 10 dB from average noise levels by 2020.

October 8, 2007 - 5:30am

XtraJet, a Santa Monica, Calif.,-based charter firm, has become the second operator to be sued by the Los Angeles Board of Airport Commissioners for allegedly committing repeated violations of the noise restrictions at Van Nuys Airport. Earlier, the board filed a similar suit against Pacific Jet (AIN, August, page 79).

July 6, 2007 - 5:22am

Cessna Citation S550 Bravo, Dillon, Mont., May 3, 2007–The ATP-rated owner-pilot and a passenger were killed when the Citation Bravo crashed on a circling instrument approach at Dillon in VMC. A witness reported hearing a loud engine noise followed by a “plop.” He said the engine noise was loud, diminished, then got loud again. He spotted a large cloud of black smoke and a fire outside the airport boundary fence.

April 2, 2007 - 11:06am

Working on reducing high-frequency cabin noise produced by air passing over the fuselage skin, UK-based Ultra Electronics and QinetiQ found what a spokesman described as “a fantastic solution to the wrong problem.” After flight tests of new-generation hybrid active/passive cabin shell mounts, researchers concluded that the system works extremely well, reducing noise transmitted through the mounts by as much as 30 dBA.

April 2, 2007 - 11:05am

Dassault plans to introduce an exceptionally quiet cabin in its new Falcon 7X business jet. The company announced at EBACE in May that it expects to create a cabin with noise levels in the 52-dB range, about four decibels less than in the Falcon 900EX. Normal cabin conversation is typically conducted in the 55- to 70-dB range.

 
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