Sonic Booms in the Sea PDF Download
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Author: Robert J Urick
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 32
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Book Description
Sonic booms laid down by Navy fighter aircraft flying at Mach 1.1-1.2 have been observed below the surface of the sea by means of a string of hydrophones 195 feet long dangling from a surface ship. The underwater booms were found to decay about as the -3/2 power of the depth below the surface, to have the same spectral content as the boom in air, and to travel down the string with the velocity of sound in water. These findings contradict the theory of an 'inhomogeneous' wave incident beyond the critical angle, as originally stated by Rayleigh and as recently extended to sonic booms by Sawyers and Cook. They suggest, instead, that the underwater sonic boom is a wave scattered by the rough sea surface into the sea below. Its decay with depth is so rapid that it is not likely to be perceptible against the ambient noise background at depths greater than one or two thousand feet in the deep sea. (Author).
Author: Robert J Urick
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 32
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Book Description
Sonic booms laid down by Navy fighter aircraft flying at Mach 1.1-1.2 have been observed below the surface of the sea by means of a string of hydrophones 195 feet long dangling from a surface ship. The underwater booms were found to decay about as the -3/2 power of the depth below the surface, to have the same spectral content as the boom in air, and to travel down the string with the velocity of sound in water. These findings contradict the theory of an 'inhomogeneous' wave incident beyond the critical angle, as originally stated by Rayleigh and as recently extended to sonic booms by Sawyers and Cook. They suggest, instead, that the underwater sonic boom is a wave scattered by the rough sea surface into the sea below. Its decay with depth is so rapid that it is not likely to be perceptible against the ambient noise background at depths greater than one or two thousand feet in the deep sea. (Author).
Author: John Orin Powers
Publisher:
ISBN:
Category : Sonic boom
Languages : en
Pages : 24
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Book Description
An attempt was made to outline the historical development of the United States supersonic transport development program and to place in proper perspective the national significance of the SST program. The technological aspects and problems of the sonic boom were reviewed. The actual overflight sonic boom programs to date were reviewed and capsule results were discussed.
Author: Jerry V. Tobias
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 16
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Book Description
Author: Louise K. Annus
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 120
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Book Description
Author: Dylan M. Jones
Publisher:
ISBN:
Category : Medical
Languages : en
Pages : 340
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Book Description
A compilation of essays by internationally known authors on the social implications of noise. Encompasses a broad range of approaches to the study and provides up-to-date accounts of the effects of noise on hearing, communication, health, human efficiency, and social behavior. Includes a discussion of legal issues and three introductory chapters covering the perception and measurement of sound.
Author:
Publisher:
ISBN:
Category : Ear
Languages : en
Pages : 560
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Book Description
Author: United States. Department of Transportation. Library Services Division
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 52
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Book Description
Author: William Burns
Publisher:
ISBN:
Category : Juvenile Nonfiction
Languages : en
Pages : 264
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Book Description
Copies are supplied by TSO's on-demand publishing service (May 2002)
