MARTIN/PERRONE : GEOGRAPHICAL VARIATION OF AMBIENT NOISE IN THE OCEAN 

 FOR THE FREQUENCY RANGE FROM 1 HERTZ TO 5 KILOHERTZ 



merchants, one less ship influences the data quite a bit, as Ira will 

 probably point out again today. 



Mr. C. W. Spofford (Office of Naval Research) : I have one 

 rather parochial comment again from the modeler's point of view on 

 the question of gathering more ambient noise data. 



In the talks this morning, and a lot of other ambient noise 

 data, I have rarely seen trends in ambient noise or depth dependencies 

 or frequency dependencies which have not fit very well within the con- 

 text of the kinds of models which we are using. 



I would like to see the measurers take into account everything 

 we think the models can interpret and explain for ambient noise and 

 then look for the things which are left which we don't have models 

 for. I think we are in very good shape in terms of ambient noise 

 modeling. 



The key questions which I think are still hanging are the ones 

 of ship characteristics: the spectra of the ships, where the ships 

 are, and how the ship couples in the medium. 



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