Underwater acoustics: transmission loss at long distance

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SUMMARY

The discussion focuses on calculating transmission loss at long distances in underwater acoustics, specifically using the Weston model for low-frequency sound (50Hz) over a range of approximately 400km. The user, Ciccio, seeks clarification on when to transition from "mode stripping" to "single mode" in the context of the Weston model. A MATLAB function for computing transmission loss is provided, along with a reference to a US Naval Academy tutorial for further guidance.

PREREQUISITES
  • Understanding of underwater acoustics principles
  • Familiarity with the Weston model for transmission loss
  • Basic knowledge of MATLAB programming
  • Experience with acoustic modeling techniques
NEXT STEPS
  • Research the specifics of the Weston model for underwater acoustics
  • Learn how to implement the MATLAB function range2tl for transmission loss calculations
  • Explore advanced acoustic modeling techniques for long-range transmission loss
  • Study the differences between mode stripping and single mode in underwater acoustics
USEFUL FOR

Acoustic engineers, researchers in underwater acoustics, and students studying sound propagation in marine environments will benefit from this discussion.

Ciccio1979
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Hi all,

I have some problems to understand how to calculate the transmission loss at long distance, which model do I have to use?
I was looking into the energy flux model (Weston model), but I didn't understand at what range I should switch from "mode stripping" to "single mode".
I am working at low frequency (50Hz) and the range I am considering is around 400km.

Can anyone help me?

Thanks a lot!
Ciccio
 
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Hi Jedishrfu,

thanks for the answer!
I have read that report, but the model described there is a simplified one.
The results obtained with that model are ok close the source, but at range of hundred km they are not realistic.
I need something more complex, this is why I was using the Weston model.

Cheers,
Ciccio
 

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