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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
501

A physical investigation into some factors affecting the musical performance of the guitar

Richardson, B. E. January 1982 (has links)
No description available.
502

Acoustic emission signal analysis

Carlyle, John Michael January 1982 (has links)
An extension of acoustic emission technology was made which permits identification of probable source mechanisms for signals emitted during the failure of metals. This was achieved through the construction of a unique instrument and the development of special computer programs. The instrument permitted wideband digital waveform recordings to be made of both acoustic emission signals generated during the failure of a specimen, as well as calibration signals derived from a helium gas jet. These recordings were then processed by the computer programs to yield power spectra insensitive to specimen geometry, thus allowing the direct comparison of acoustic emissions from different specimens. A series of experiments conducted to test the instrument and the programs resulted in the conclusion that, at the 95% confidence level, acoustic emission caused by brittle particle fracture in 7039 aluminum could be differentiated from acoustic emission caused by the discontinuous movement of a crack in 4340 steel. Detailed descriptions of acoustic emission source modeling, transducer operating principles, calibration techniques and digital signal processing provide the necessary theoretical background for the reported technology extension, while a comprehensive review of the literature of acoustic emission places the experimental work into the proper context.
503

Ultrasonic inspection of concrete structures to detect the condition of embedded steel components

Damaj, Walid Taha January 1990 (has links)
No description available.
504

High resolution ultrasonic imaging system

Goode, Ashley Harford January 1989 (has links)
No description available.
505

Performance and condition monitoring of reciprocating machines using acoustic emission

Elghamry, Mohamed Hussein January 2000 (has links)
No description available.
506

Vibrational mode pinning : with application to acoustic direction sensing

Jardine, Stuart Inglis January 1983 (has links)
No description available.
507

Transmission of sound through non-homogeneous walls

Lee, Siew-Eang January 1985 (has links)
No description available.
508

Optical beam array generation with phase gratings

Ichikawa, Hiroyuki January 1991 (has links)
No description available.
509

Theoretical and experimental studies of the acoustic directional sensor

Su, Daoning January 1988 (has links)
No description available.
510

A study of sound transmission through buildings using statistical energy analysis

Craik, Robert J. M. January 1980 (has links)
No description available.

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