Quote:
Originally Posted by Pisces
Good point. I am not sure how well the utility by Heinrich Liebe compares to LWAMI, as I think it pre dates it. I used it, but it is too long ago to remember if there were discrepancies.
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I do not know what it is that utility or what it does.
But if one of its aims is to help the user in the "sound profile identification process" based on the comparison between the detected narrowband frequencies of a contact against the "sound profile ingame database" well... chances are in_vino_vomitus does not really need it as he is using LWAMI.
Why it is so? Becuase the mod, as already said, changes all the patforms sound profiles and it changes them in a (imo) "more logical" way. Partial sound profiles in LWAMI are "less generic" than in vanilla DW, and you can actually uniquelly id a contact with only 3 frequencies detected or even with 2 (with a good, educated guess).
For example, consider that the 2nd frequency value depends on the contact plower plant characteristics and the 3rd frequency value is determined by the contact displacement. So with just the 2nd/3rd line and a bit of intel data you can guessestimate who is who. Even without intel to hep you make an educated guess, the LWAMI platforms sound profiles are "more unique" than in vanilla DW and you usually have less matching sound profiles to check over.
I invite once again the OP to read the first pages of the LWAMI mod, and the specific section in that manual about Sound Profiles and their logic. The LWAMI authors have done a great job, I really appreciate it VERY much.
--- EDIT
From the LWAMI manual:
1.1.4 Sonar Profiles
Starting in version 3.11, every narrowband signature has been revised. This was done because the large number of platforms we added meant that users would have to go through a very large number of possible profiles when attempting to classify at narrowband. This problem was made worse by the existing convention of having very different ships having similar profiles, which meant that the possible profiles would not even help the player guess what the contact was.
In LWAMI, each of the first 3 frequency lines give the player information about the contact. This information is useful for classification even without the filter. When used with the filter, the player can be confident that the profiles shown have concrete similarities with the actual contact.
As before, the first line remains an indication of the electrical system used. Many of the assignments have changed, however. Ships originally built for Western Europe, Canada, South Korea, Taiwan, Brazil, Colombia, and Saudi Arabia have switched to 60hz. Note that this is not necessarily the same as the country they were built in or currently serve for.
The second line now represents the power plant. Knowing the power plant narrows down the classification significantly. For example, nuclear or diesel-electric almost always mean submarine, gas turbine almost always means fast warship, gasoline means small craft, and steam turbines tend to be older vessels. The frequencies are:
100hz: Steam Turbine
125hz: Nuclear
140hz: Gas Turbine
160hz: (Diesel-)Electric
175hz: Diesel
190hz: Gasoline
215hz: Rocket Torpedo
225hz: Electric Torpedo
240hz: Chemical (“Otto”) Torpedo
275hz: Peroxide Torpedo
These frequencies are adjusted -5 for a shrouded prop or pumpjet (single shaft only), and are adjusted +5 for two shafts and +10 for three or more shafts. In the case of combined propulsion types (not including diesel-electric subs, which are treated as electric only), there are two “second” lines. For example, a CODAG (combined diesel and gas) ship with two shafts has lines at 145 and 180.
The third line represents the size (displacement) of the ship, and can be thought of as flow noise. The frequencies are:
600hz: <25 tons:
575hz: 50 tons
550hz: 100 tons
525hz: 500 tons
500hz: 1000 tons
450hz: 2500 tons
425hz: 5000 tons
400hz: 10000 tons
375hz: 15000 tons
350hz: 25000 tons
325hz: 50000 tons
300hz: 100000 tons
The last two lines (or line, if it has two “second” lines) in many cases are unchanged, but some have been adjusted to give hints about nationality.