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040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
0861 |aD68-21/44-1995E-PDF
1001 |aOsler, John C., |eauthor.
24510|aSource level calibration of the DREA moving coil projector / |cJohn C. Osler - David M.F. Chapman ; approved by C.W. Bright.
264 1|aDartmouth, N.S. : |bNational Defence, Research and Development Branch = Défense nationale, Bureau de recherche et développement : |bDefence Research Establishment Atlantic = Centre de recherches pour la défense Atlantique, |cMay 1995.
300 |a1 online resource (v, 30 pages) : |bgraphs, photographs.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aTechnical memorandum ; |v95/215
500 |aDigitized edition from print [produced by Defence Research and Development Canada].
504 |aIncludes bibliographical references.
5203 |a"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.
546 |aIncludes abstracts in English and French.
61020|aDefence Research Establishment Atlantic.
61025|aCentre de recherches pour la deĢfense Atlantique.
650 0|aAcoustic localization|xMethodology.
650 0|aProjectors|xCalibration|xMethodology.
650 6|aLocalisation acoustique|xMéthodologie.
650 6|aProjecteurs (Appareils de projection)|xÉtalonnage|xMéthodologie.
7102 |aDefence Research Establishment Atlantic, |eissuing body.
7101 |aCanada. |bDepartment of National Defence. |bResearch and Development Branch, |eissuing body.
830#0|aD.R.E.A. technical memorandum ;|v95/215.|w(CaOODSP)9.941838
85640|qPDF|s1.33 MB|uhttps://publications.gc.ca/collections/collection_2025/rddc-drdc/D68-21-44-1995-eng.pdf