Signatures were collected of a SCUD missile engine at Huntsville, AL and a Minuteman engine at Edwards AFB. The US Army Research Laboratory and Los Alamos National Laboratory have collected acoustic and infrasonic signatures of static engine testing of two missiles. 1 to 300 Hz that can be operated outdoors for extended periods of time with out degrading their performance. This technology is based on microphones designed to respond to frequencies from. Space shuttle launches have been detected infrasonically from over 1000 km away and the Concorde airliner from over 400 km. The atmosphere attenuates acoustic energy above 20 Hz quite rapidly, but signals below 10 Hz can propagate to long ranges. Infrasonics offers the potential of long-range acoustic detection of explosions, missiles and even sounds created by manufacturing plants. And that both signals must be defined in greater depth than overall level, or average frequencyĪcoustic/infrasonic rocket engine signatures
In either case it is necessary to understand that the probability of detection is a function of both the vehicle acoustic signature and.the acoustic masking component, or soundscape. Represent complex scenarios such as urban scenes with multiple sources in the soundscape and significant amount of reverberation and diffraction effects. Dual acoustic signatures discriminate between various fluids and materials for identification of the same.ĭetection and Identification of Acoustic Signatures Methods and apparatus for multi-parameter acoustic signature inspectionĭiaz, Aaron A [Richland, WA Samuel, Todd J [Pasco, WA Valencia, Juan D [Kennewick, WA Gervais, Kevin L [Richland, WA Tucker, Brian J [Pasco, WA Kirihara, Leslie J [Richland, WA Skorpik, James R [Kennewick, WA Reid, Larry D [Benton City, WA Munley, John T [Benton City, WA Pappas, Richard A [Richland, WA Wright, Bob W [West Richland, WA Panetta, Paul D [Richland, WA Thompson, Jason S [Richland, WAĪ multiparameter acoustic signature inspection device and method are described for non-invasive inspection of containers.
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