What makes the most noise in a submarine?

speed150mph · 10-27-17, 02:40 PM

I was reading the article in the news feed about the Chinese supposedly testing an MHD propulsion system and a question entered my mind that I though I'd put forward to you gents.

Obviously some details are probably classified, and this probably differs from sub type and class and speed and depth. However I'm curious just how much of a modern nuclear submarine's radiated noise signature is produced by the screw pump jet, and other assorted drive components that directly propel the submarine.

By comparison how much noise is produced by the machinery like pumps, hydraulics, electric generators, steam noises from the reactor Ect. How much is created by other factors like flow noise, and crew.

Thanks

ET2SN · 10-27-17, 04:59 PM

Quote:

Originally Posted by speed150mph

Obviously some details are probably classified

You're right, they are.

speed150mph · 10-27-17, 11:10 PM

Shoot. Knew I should have joined the navy. But then again Canada doesn't have much of a Navy to join XD

Mr Quatro · 10-28-17, 08:09 AM

What makes the most noise on a submarine?

The chief of the boat when they run out of coffee

Sailor Steve · 10-28-17, 11:22 AM

ET2SN · 10-29-17, 07:43 AM

Quote:

Originally Posted by Mr Quatro

What makes the most noise on a submarine?

The chief of the boat when they run out of coffee

Don't forget Tacos and Chili Casserole night in crew's mess.

ETR3(SS) · 10-31-17, 01:38 PM

The A-Gang LPO running naked covered in creamed corn towards the AMR2 watch on halfway night.

ET2SN · 11-01-17, 02:32 AM

The sound of EB Green tape being pulled off its roll.
Especially when its you who's about to get wrapped in it.

MR_AUS · 11-28-17, 05:30 PM

Some interesting (and technical) info here:
https://www.armscontrol.ru/subs/snf/snf03221.htm

http://gentleseas.blogspot.com.au/20...ine-noise.html

mapuc · 11-28-17, 06:26 PM

This thread made me remember a documentary about modern subs.

In this program a person(can't remember his title) said each time we have erased a noise problem in a sub a new one pops-up.

When he said those words I came to think of a saying- A chain isn't stronger than its weakest part.

Translate this into the world of Subs - A sub isn't more silence than its noisiest part.

Markus

Howitzer · 11-28-17, 10:21 PM

If you remember the name of the documentary, please let us know. I don't recall seeing the one that you described.

10-27-17, 02:40 PM	#1
speed150mph Electrician's Mate Join Date: Feb 2013 Location: Alberta, Canada Posts: 132 Downloads: 36 Uploads: 0	What makes the most noise in a submarine? I was reading the article in the news feed about the Chinese supposedly testing an MHD propulsion system and a question entered my mind that I though I'd put forward to you gents. Obviously some details are probably classified, and this probably differs from sub type and class and speed and depth. However I'm curious just how much of a modern nuclear submarine's radiated noise signature is produced by the screw pump jet, and other assorted drive components that directly propel the submarine. By comparison how much noise is produced by the machinery like pumps, hydraulics, electric generators, steam noises from the reactor Ect. How much is created by other factors like flow noise, and crew. Thanks __________________ Americans make better submarines? No my friend, Russia makes better submarines, Americans just make better computers

10-27-17, 11:10 PM	#3
speed150mph Electrician's Mate Join Date: Feb 2013 Location: Alberta, Canada Posts: 132 Downloads: 36 Uploads: 0	Shoot. Knew I should have joined the navy. But then again Canada doesn't have much of a Navy to join XD __________________ Americans make better submarines? No my friend, Russia makes better submarines, Americans just make better computers

10-28-17, 08:09 AM	#4
Mr Quatro Navy Seal Join Date: May 2013 Posts: 6,772 Downloads: 0 Uploads: 0	What makes the most noise on a submarine? The chief of the boat when they run out of coffee __________________ pla•teau noun a relatively stable level, period, or condition a level of attainment or achievement Lord help me get to the next plateau ..

10-28-17, 11:22 AM	#5
Sailor Steve Eternal Patrol Join Date: Nov 2002 Location: High in the mountains of Utah Posts: 50,369 Downloads: 745 Uploads: 249	__________________ “Never do anything you can't take back.” —Rocky Russo

10-31-17, 01:38 PM	#7
ETR3(SS) Ocean Warrior Join Date: Dec 2007 Location: Between test depth and periscope depth Posts: 3,021 Downloads: 175 Uploads: 16	The A-Gang LPO running naked covered in creamed corn towards the AMR2 watch on halfway night. __________________ USS Kentucky SSBN 737 (G) Comms Div 2003-2006 Qualified 19 November 03 Yes I was really on a submarine.

11-01-17, 02:32 AM	#8
ET2SN Ocean Warrior Join Date: Oct 2017 Posts: 2,652 Downloads: 60 Uploads: 0	The sound of EB Green tape being pulled off its roll. Especially when its you who's about to get wrapped in it.

11-28-17, 05:30 PM	#9
MR_AUS Watch Join Date: Sep 2017 Posts: 26 Downloads: 14 Uploads: 0	Some interesting (and technical) info here: https://www.armscontrol.ru/subs/snf/snf03221.htm http://gentleseas.blogspot.com.au/20...ine-noise.html __________________ https://i.imgur.com/LoGTMLb.jpg

11-28-17, 06:26 PM	#10
mapuc CINC Pacific Fleet Join Date: Sep 2003 Location: Denmark Posts: 20,540 Downloads: 37 Uploads: 0	This thread made me remember a documentary about modern subs. In this program a person(can't remember his title) said each time we have erased a noise problem in a sub a new one pops-up. When he said those words I came to think of a saying- A chain isn't stronger than its weakest part. Translate this into the world of Subs - A sub isn't more silence than its noisiest part. Markus

11-28-17, 10:21 PM	#11
Howitzer Swabbie Join Date: Nov 2017 Posts: 7 Downloads: 24 Uploads: 0	If you remember the name of the documentary, please let us know. I don't recall seeing the one that you described.