CONTENTS 



CH. 12. Sound in the Sea by P. Vigoureux and J. B. Hersey 



1 . The nature of sound ...... 



2. Propagation of sound in water .... 



3. Noise 



4. Instruments and applications of sound to oceanography 



CH. 13. Sound Scattering by Marine Organisms by J. B. Hersey and 

 R. H. Backus ...... 



1. Introduction ...... 



2. Occurrence and description of scattering layers 



3. Identification of sound scatterers . 



4. Sound-scattering theory .... 



5. Sound-scattering observations 



6. What is "the deep scattering layer" ? 



7. Ideas and miscellaneous observations . 



CH. 14. Sound Production by Marine Animals by W. E. Schevill, R. H. 

 Backus, and J. B. Hersey 



1. Introduction 



2. History 



3. Instrumentation. 



4. Identification of source 



5. Purposeful and adventitious sounds 



6. Sound-producing mechanisms 



7. Spectra of sounds 



8. Functions of sound 



9. Hearing as related to sound production 



10. Eliciting and suppressing marine animal sounds 



11. Exploitation of marine animal sounds by the oceanographer 



Section V. Waves ....... 



CH. 15. Analysis and Statistics by D. E. Cartwright 



1. Introduction ..... 



2. Fundamental equations of wave motion 



3. Statistical formulation 



4. Properties of a wave system in terms of its directional 

 spectrum ...... 



5. Estimating the directional energy spectrum 



6. Waves recorded by a single detector 



7. Spectral measm'ement . 



8. Second-order approximations to energy spectra 



CH. 16. Long-Term Variations in Sea-Level by J. R. Rossiter 



1. Introduction ....... 



2. The determination of mean sea-level 



3. Causes of variations in sea-level .... 



4. The analysis of observations .... 



5. Some geophysical implications of long-term variations 

 level ........ 



6. Conclusion ....... 



energy 



in sea- 



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