SONAR Folks: Acoustics model questions

feld · 10-05-06, 12:27 AM

I am interested in writing DW campaigns using the LWAMI mod but I'm running into acoustic problems. I think they're similar to some that SeaQueen mentioned before here. I've read Sonalysts Game Design Notes (SGDN), played the game, and poked around the forums enough to learn alittle...
fair warning: All this means is that I am now dangerous enough to start actually asking questions

1. How does mission editor selected sea state affect ambient noise? I expect Wenz curves but cannot tell from the displays...
2. How does the weather selection change the ambient noise?
3. Does the model change the ambient noise based on the number of ships present?
4. I've noticed that the "bottom limited" setting sometimes produces a strong positive grandient and other times a strong negative one. Can anyone explain why?
5. Does the game model frequency cutoffs in ducts?
6. Does the game model the Deep Sound Channel? I see the beginnings of one on certain tropical/subtropical deep water CZ SSPs (e.g. Phillippine Sea, August, 1200, CZ shows a sound speed minimum below the thermal layer...now if I just had an ALFA to get down into it...)
7. How many bottom bounces does the propagation loss model compute? Or am I totally out to lunch and it's not a ray tracer?
8. Does the model use the month and time of day settings to adjust sea surface temperature?

If anyone has any insights, I'd greatly appreciate them...thanks!

feld

10-05-06, 12:27 AM	#1
feld Loader Join Date: Sep 2003 Posts: 84 Downloads: 22 Uploads: 0	SONAR Folks: Acoustics model questions I am interested in writing DW campaigns using the LWAMI mod but I'm running into acoustic problems. I think they're similar to some that SeaQueen mentioned before here. I've read Sonalysts Game Design Notes (SGDN), played the game, and poked around the forums enough to learn alittle... fair warning: All this means is that I am now dangerous enough to start actually asking questions 1. How does mission editor selected sea state affect ambient noise? I expect Wenz curves but cannot tell from the displays... 2. How does the weather selection change the ambient noise? 3. Does the model change the ambient noise based on the number of ships present? 4. I've noticed that the "bottom limited" setting sometimes produces a strong positive grandient and other times a strong negative one. Can anyone explain why? 5. Does the game model frequency cutoffs in ducts? 6. Does the game model the Deep Sound Channel? I see the beginnings of one on certain tropical/subtropical deep water CZ SSPs (e.g. Phillippine Sea, August, 1200, CZ shows a sound speed minimum below the thermal layer...now if I just had an ALFA to get down into it...) 7. How many bottom bounces does the propagation loss model compute? Or am I totally out to lunch and it's not a ray tracer? 8. Does the model use the month and time of day settings to adjust sea surface temperature? If anyone has any insights, I'd greatly appreciate them...thanks! feld