00000nam 2200000zi 4500 9.936236 CaOODSP 20241007095055 m o d f cr |n||||||||| 240402s1990 bccad obt f000 0 eng d CaOODSP eng rda CaOODSP n-cn--- DR52-12/3-1990E-PDF Greening, Michael Victor, 1961- author. Arctic ambient noise and modelling / Michael V. Greening. Vertical directivity measurements of ice cracking Extraction of the seabed reflectivity function using ice cracking noise as a signal source Victoria, B.C. : JASCO Research Ltd., [1990] 1 online resource (1 volume (various pagings)) : illustrations, charts text txt rdacontent computer c rdamedia online resource cr rdacarrier Contractors report series ; 90-16 Cover title. Digitized edition from print [produced by Defence Research and Development Canada]. Includes bibliographical references. Arctic ambient noise and modelling / Michael V. Greening -- Vertical directivity measurements of ice cracking / Michael V. Greening, Pierre Zakarauskas, Ronald I. Verrall -- Extraction of the seabed reflectivity function using ice cracking noise as a signal source / Pierre Zakarauskas, Ronald I. Verrall, Michael V. Greening. "The report is an addendum to the two papers "Vertical Directivity Measurements of Ice Cracking" and "Extraction of the Seabed Reflectivity Function Using Ice Cracking as a Signal Source". The report presents the results completed, along with a description of the tasks remaining to obtain measurements of the spatial, strength and temporal distributions of the source. Upon completion of these results, the source model describing the total energy entering the water from ice cracking will be completed. This will then be combined with a propagation model to produce a noise model capable of reproducing various ambient noise features such as the coherence across a vertical array. The aim of this work is to produce a source model of low frequency (smaller than or equal to 200 Hz) Arctic acoustic noise."--page 1. Ice Acoustic properties Arctic Ocean. Acoustic models. Glace Propriétés acoustiques Arctique, Océan. Modèles acoustiques. Technical reports lcgft Rapports techniques rvmgf JASCO Research Ltd., issuing body. Defence Research Establishment Pacific, issuing body. Canada. Department of National Defence. Research and Development Branch, issuing body. Contractors report series ; 90-16. (CaOODSP)9.936079 PDF 2.34 MB https://publications.gc.ca/collections/collection_2024/rddc-drdc/DR52-12-3-1990-eng.pdf