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Source level calibration of the DREA moving coil projector / John C. Osler - David M.F. Chapman ; approved by C.W. Bright. : D68-21/44-1995E-PDF

"The Defence Research Establishment Atlantic moving coil projector (MCP) generates acoustic power at low frequencies (below 250 Hz) by displacing water with two pistons which oscillate in phase. The source level of the MCP must be continually monitored because it varies in accordance with the operating state of the projector. Source level as a function of time may be determined by combining measurements of the acceleration of the forward and aft pistons in an appropriate manner. This document establishes the methodology to use in this process by comparing at-sea measured transmission loss of CW signals to theoretical calculations. This comparison reveals that corrections are required to the source level derived from the MCP accelerometers at the higher end of its frequency range"--Abstract, page ii.

Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.951551&sl=1

Renseignements sur la publication
Ministère/Organisme
  • Defence Research Establishment Atlantic, issuing body.
  • Canada. Department of National Defence. Research and Development Branch, issuing body.
TitreSource level calibration of the DREA moving coil projector / John C. Osler - David M.F. Chapman ; approved by C.W. Bright.
Titre de la série
  • Technical memorandum ; 95/215
Type de publicationMonographie - Voir l'enregistrement principal
Langue[Anglais]
FormatTexte numérique
Document électronique
Note(s)
  • Digitized edition from print [produced by Defence Research and Development Canada].
  • Includes bibliographical references.
  • Includes abstracts in English and French.
Information sur la publication
  • Dartmouth, N.S. : National Defence, Research and Development Branch = Défense nationale, Bureau de recherche et développement : Defence Research Establishment Atlantic = Centre de recherches pour la défense Atlantique, May 1995.
Auteur / Contributeur
  • Osler, John C., author.
Description1 online resource (v, 30 pages) : graphs, photographs.
Numéro de catalogue
  • D68-21/44-1995E-PDF
Descripteurs
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