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Direct-field acoustic testing, or DFAT®, is a technique used for acoustic testing of aerospace structures by subjecting them to sound waves created by an array of acoustic drivers. [1] The method uses electro-dynamic acoustic loudspeakers, arranged around the test article to provide a uniform, well-controlled, direct sound field at the surface ...
In the aerospace industry, acoustic chambers are the main facilities for such tests. A chamber is a reverberant room that creates a diffuse sound field and is composed of an empty volume (from 1 m 3 to 2900 m 3 ) and a multifrequency sound generation system.
The Reverberant Acoustic Test Facility has 36 nitrogen-driven horns to simulate the high noise levels that are experienced during a space vehicle launch and supersonic ascent conditions. The RATF is capable of an overall sound pressure level of 163 dB within a 101,500-cubic-foot (2,870 m 3 ) chamber.
The Space Shuttle Enterprise rolls out of the Palmdale manufacturing facilities with Star Trek cast and crew members in September 1976. Northrop B-2A roll-out ceremony on November 22, 1988, at USAF Plant 42. Palmdale Army Airfield was declared a surplus facility in 1946 and was purchased by Los Angeles County for use as a municipal airport.
The Santa Susana Field Laboratory (SSFL), formerly known as Rocketdyne, is a complex of industrial research and development facilities located on a 2,668-acre (1,080 ha) [1] portion of Southern California in an unincorporated area of Ventura County in the Simi Hills between Simi Valley and Los Angeles.
The reservoir was transferred to the Los Angeles County Department of Public Works in 1995. The test facility was established by Caltech, which was developing weapons for the Navy at its Naval Ordnance Test Station (NOTS) at China Lake (town), near Ridgecrest, California. It today is now known as the Naval Air Weapons Station China Lake, and is ...
Acoustic resonance technology (ART) is an acoustic inspection technology developed by Det Norske Veritas over the past 20 years. ART exploits the phenomenon of half-wave resonance, whereby a suitably excited resonant target (such as a pipeline wall) exhibits longitudinal resonances at certain frequencies characteristic of the target's thickness.
The 50,000 square feet (4,600 m 2) [4] facility was built on 2.5 acres (1.0 ha) in 1941 as a World War II air defense center to coordinate radar installations in the Los Angeles area. [3] When the studio was established in 1947, its purpose was kept secret.
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