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steel shark · 05-23-20, 05:04 AM

Noise level’s play a very important part of cold waters so getting them right is a major chunk of realism for instance early soviet boats were very loud see pic.1 & 2

this was mainly down to a few factors 1 multiple propellers’ 2 not as well made propeller’s as in machine milling 3 twin reactors and 4 louder reactors made worse by the fact most soviet designs used 2 but they were more compact and powerful then western designs of the time but not as safe

a good example is the echo class ssgn this boat was basically a November class with large cut outs along its port and starboard sides for missile back blast this added drag and extra noise when moving through the water how ever since the boat it was based on the November class was all ready very loud this made this class loudest submarine in the game even the SSN version which was a echo class with missiles removed and the missile cut outs welded up was still loud tho a lot more quieter

but there are other factors too thermal layers / bottom bounce that’s when the sonar system hits the sea floor and bounces back up / shallow waters the sonar reverberates of floor targets / and sea state heavy rain can an add up to 30db cause of the large surface of the ocean the rain hits and waves all mask targets noise signature

also a problem is the noise value of a boat is single so a diesel boat doesn’t have a second noise value for its electric motors for instance see pic pic.3

also the noise of the oceans has grown because of more sea traffic has raises the Ocean Base Ambient about 10bd more so modern asw Anti-Submarine-Warfare is that much harder now

I spent much time on this and ive made a quite good detailed noise charts other problem is you have to make all vessels stack if you only did lets say subs then surface warships and merchants ships would be off

noise per knot that had to be reworked too which in turn i adjusted cavitation noise value and then in turn the vessels cavitation rating which boils down to three choices 1.propellers / 2.Low Cavitation Propellers / 3.Pump Jet Propulsion .

ill post my in game values at some point if any body wants them let me know

05-23-20, 05:04 AM	#6
steel shark XO Join Date: Oct 2019 Location: Uk Posts: 414 Downloads: 48 Uploads: 5	Noise Values In cold Waters Noise level’s play a very important part of cold waters so getting them right is a major chunk of realism for instance early soviet boats were very loud see pic.1 & 2 this was mainly down to a few factors 1 multiple propellers’ 2 not as well made propeller’s as in machine milling 3 twin reactors and 4 louder reactors made worse by the fact most soviet designs used 2 but they were more compact and powerful then western designs of the time but not as safe a good example is the echo class ssgn this boat was basically a November class with large cut outs along its port and starboard sides for missile back blast this added drag and extra noise when moving through the water how ever since the boat it was based on the November class was all ready very loud this made this class loudest submarine in the game even the SSN version which was a echo class with missiles removed and the missile cut outs welded up was still loud tho a lot more quieter but there are other factors too thermal layers / bottom bounce that’s when the sonar system hits the sea floor and bounces back up / shallow waters the sonar reverberates of floor targets / and sea state heavy rain can an add up to 30db cause of the large surface of the ocean the rain hits and waves all mask targets noise signature also a problem is the noise value of a boat is single so a diesel boat doesn’t have a second noise value for its electric motors for instance see pic pic.3 also the noise of the oceans has grown because of more sea traffic has raises the Ocean Base Ambient about 10bd more so modern asw Anti-Submarine-Warfare is that much harder now I spent much time on this and ive made a quite good detailed noise charts other problem is you have to make all vessels stack if you only did lets say subs then surface warships and merchants ships would be off noise per knot that had to be reworked too which in turn i adjusted cavitation noise value and then in turn the vessels cavitation rating which boils down to three choices 1.propellers / 2.Low Cavitation Propellers / 3.Pump Jet Propulsion . ill post my in game values at some point if any body wants them let me know Last edited by steel shark; 05-29-20 at 09:40 AM.