Patch or mod to fix this?

Bubblehead Nuke · 01-10-07, 02:04 AM

I am fully up to date. I am talking about the radiated noise vs ownships speed. Right now it is as you said, the faster you go the noisier you are. However, that is actually not true.

Being VERY careful how I word this now.....

Ownships noise does not increase in proportion to ships speed. Up to a certain point you can increase ships speed with little change in radiated noise levels. Once a certain speed is attained you have a marked increase in radiated ships noise. The only real detrimental affect speed has until that point is the effectiveness of ships sensors. As far as you being detected, going faster does not increase your chance of being detected, but DECREASES your abiltity to detect the OTHER guy.

I have talked about this in roundabout terms before. I am trying to explain it in generic terms that will not compromise operational boats. Please forgive me if this sounds dumbed down.

BigBadVuk · 01-10-07, 05:59 AM

I agree with you Bubblehead...
Let me put this way: If u are using only 30% of reractor power and your main coolant pumps are on LOW settings and you are creeping at 2 knots you are very,very quiet..If you speed up to 5-7 you will ( im not shure for details,but you will understand) have to increase power outputo to lets say 40%,BUT your coolant pumps will still be able to keep up with heat on LOW.Now if you need to go faster you will at some point switch from LOW to HIGH ( or whatever you call that) and voila: there is sudden increase in noise on certain freq. and that level of noise will stay for lets say up to 20 or so and then will suddenly go even louder..etc..Im talking about reactor equipment only,im not talking about turbines,generators and other aux equipment... Im not an expert but i think there are few of this "thresholds" around.
But if you are going fast and then you order all stop you will not stop at once but radiated nose will be reducet almoust instantly...

Dr.Sid · 01-10-07, 07:05 AM

Yeah .. radiated ownship noise does not increase that much .. but waterflow noise does increase. All summed noise does increase.

It is however fact that ship's noise is made mostly of discrete frequencies and is visible on NB, while waterflow noise is only visible on BB, which too is not reflected in DW AFAIK.

XabbaRus · 01-10-07, 07:30 AM

Well write to Jamie, I am sure this is something that could be looked at and incorporated

Dr.Sid · 01-10-07, 11:11 AM

Well I'm sceptical about 1.04 .. something like this is beyond my imaginations

But maybe something like this could be only database change, since you can set whether sound is NB or BB, you can also set if sound level increases with speed or not (if I remember correctly). Only thing I'm not sure with is if you can have more sound sources for boat.

01-10-07, 05:59 AM	#2
BigBadVuk Ensign Join Date: Jan 2006 Location: Belgrade,Serbia Posts: 222 Downloads: 6 Uploads: 0	I agree with you Bubblehead... Let me put this way: If u are using only 30% of reractor power and your main coolant pumps are on LOW settings and you are creeping at 2 knots you are very,very quiet..If you speed up to 5-7 you will ( im not shure for details,but you will understand) have to increase power outputo to lets say 40%,BUT your coolant pumps will still be able to keep up with heat on LOW.Now if you need to go faster you will at some point switch from LOW to HIGH ( or whatever you call that) and voila: there is sudden increase in noise on certain freq. and that level of noise will stay for lets say up to 20 or so and then will suddenly go even louder..etc..Im talking about reactor equipment only,im not talking about turbines,generators and other aux equipment... Im not an expert but i think there are few of this "thresholds" around. But if you are going fast and then you order all stop you will not stop at once but radiated nose will be reducet almoust instantly... __________________ Any ship can submerge.. Only submarine can surface!

01-10-07, 07:30 AM	#4
XabbaRus Navy Seal Join Date: Sep 2001 Posts: 5,330 Downloads: 5 Uploads: 0	Well write to Jamie, I am sure this is something that could be looked at and incorporated __________________

01-10-07, 02:04 AM	#1
Bubblehead Nuke XO Join Date: Feb 2006 Posts: 435 Downloads: 5 Uploads: 0	I am fully up to date. I am talking about the radiated noise vs ownships speed. Right now it is as you said, the faster you go the noisier you are. However, that is actually not true. Being VERY careful how I word this now..... Ownships noise does not increase in proportion to ships speed. Up to a certain point you can increase ships speed with little change in radiated noise levels. Once a certain speed is attained you have a marked increase in radiated ships noise. The only real detrimental affect speed has until that point is the effectiveness of ships sensors. As far as you being detected, going faster does not increase your chance of being detected, but DECREASES your abiltity to detect the OTHER guy. I have talked about this in roundabout terms before. I am trying to explain it in generic terms that will not compromise operational boats. Please forgive me if this sounds dumbed down.

01-10-07, 07:05 AM	#3
Dr.Sid The Old Man Join Date: May 2005 Location: Czech Republic Posts: 1,458 Downloads: 6 Uploads: 0	Yeah .. radiated ownship noise does not increase that much .. but waterflow noise does increase. All summed noise does increase. It is however fact that ship's noise is made mostly of discrete frequencies and is visible on NB, while waterflow noise is only visible on BB, which too is not reflected in DW AFAIK.

01-10-07, 11:11 AM	#5
Dr.Sid The Old Man Join Date: May 2005 Location: Czech Republic Posts: 1,458 Downloads: 6 Uploads: 0	Well I'm sceptical about 1.04 .. something like this is beyond my imaginations But maybe something like this could be only database change, since you can set whether sound is NB or BB, you can also set if sound level increases with speed or not (if I remember correctly). Only thing I'm not sure with is if you can have more sound sources for boat.