Progress in Underwater Acoustics

1. Front Matter

   Pages i-xv

   PDF

2. Opening

   1. Opening Address

      • D. Schofield

      Pages 1-5

3. Sound Scattering From Ocean Boundaries

   1. Acoustical Visualisation of the Ocean Bottom

      • L. M. Brekhovskikh, V. V. Krasnoborodko, V. Ch. Kiriakov

      Pages 7-13

   2. The Sea Bottom Backscattering of Sound (The History and Modern State)

      • Yu. Yu. Zhitkovskii

      Pages 15-23

   3. A Unified Description of Wave Scattering at Boundaries with Large and Small Scale Roughness

      • A. G. Voronovich

      Pages 25-34

   4. Validity of the Born and Rytov Approximations

      • S. Leeman, P. Chandler, L. A. Ferrari, D. A. Seggie

      Pages 35-41

   5. Multiple Scattering at Rough Ocean Boundaries

      • John A. DeSanto

      Pages 43-49

   6. Rough Surface Scattering and the Kirchhoff Approximation

      • Diana F. McCammon, Suzanne T. McDaniel

      Pages 51-55

   7. High Frequency Scattering from Rough Bottoms and the Second Born Approximation

      • Stanley A. Chin-Bing, Michael F. Werby

      Pages 57-64

   8. Statistical Characteristics of Acoustic Fields Scattered at the Sea Surface: A Helmholtz-Gulin Model

      • Jerald W. Caruthers, Stanley A. Chin-Bing, Jorge C. Novarini

      Pages 65-73

   9. The Importance of Hybrid Ray Paths, Bottom Loss, and Facet Reflection on Ocean Bottom Reverberation

      • Dale D. Ellis, J. B. Franklin

      Pages 75-84

4. Scattering by Biological and Other Bodies

   1. The Study of Sound Backscattering From Microinhomogeneities in Sea Water

      • V. A. Akulichev, V. A. Bulanov

      Pages 85-92

   2. Scaring Effects in Fish and Harmful Effects on Eggs, Larvae and Fry by Offshore Seismic Explorations

      • John Dalen, Geir Magne Knutsen

      Pages 93-102

   3. Fish Stock Assessment by a Statistical Analysis of Echo Sounder Signals

      • P. N. Denbigh, J. Weintroub

      Pages 103-112

   4. Processing of Fish Echo-Signals for Classification Purpose

      • D. Vray, G. Gimenez

      Pages 113-120

   5. Broadband Acoustical Scattering by Individual Fish

      • Leif Bjørnø, Niels Kjærgaard

      Pages 121-128

   6. Multichannel False Color Echograms as a Biological Interpretative Tool

      • N. A. Cochrane, D. D. Sameoto

      Pages 129-135

   7. Study of the Pseudo — Lamb Wave So Generated in Thin Cylindrical Shells Insonified by Short Ultrasonic Pulses in Water

      • Maryline Talmant, Gérard Quentin

      Pages 137-144

   8. Scattering of an Acoustic Wave by a Transmission-Loss Tile

      • R. J. Brind

      Pages 145-151

   9. Frequency Dependence of the Interaction of Ultrasound with Suspended Sediment Particles

      • A. S. Schaafsma, A. J. Wolthuis

      Pages 153-160

IMAGE TRACKS AT HALIFAX by L.B. Felsen All living kind much effort spend Some model modes, some model rays, To cope with their environment Some feel that spectra all portrays. Some use their eyes, some use their nose Then there are those who with despatch, To sense where other things repose. Take refuge in the ocean wedge. For one group, nothing's more profound Than to explore the world with sound. If things get messy, randomize. These audio diagnosticians What's partly smooth, determinize. You ponder, is it this or that? Go by the name of acousticians. And wish you were a lowly bat They regularly meet to check Whether their sonogram's on track. The meeting's hosts did treat us well. With images stored in their packs, They let the climate cast its spell. This year they came to Halifax. No weath'ry hope was placed in vain. There they combined with ocean types We were exposed to wind and rain, And each could hear the other's gripes. We glimpsed blue sky through clouds dispersed. A meeting naturally does start But rainy sequence was reversed: Reviewing present state of art. The ocean types would like it wet What we found out is where it's at: Yet they got stuck with sun instead. We cannot hope to match the bat Each confrence has the same refrain: Computer printouts by the reams It has been fun to meet again.

• Apertur
• acoustics
• filter
• interference
• interferometer
• iron
• laser
• phase
• remote sensing
• scattering
• sensors
• sun
• transmission
• ultrasound
• wave equation

• Defence Research Establishment Atlantic, Dartmouth, Canada

  Harold M. Merklinger

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