SUBSIM Radio Room Forums - View Single Post - Are hull expansion and plane hydraulic noise modeled?

C-Wolf · 03-13-18, 06:55 PM

In real life, hull compression and expansion when changing depth makes minimal noise and isn't a classification cue unless you're in a (very) close trail, which causes an acoustic phenomena called Near Field Effect.

Transients from plane movement can occur, depending on the boat, but aren't common. We spent two months with fairwater planes that not only sounded like biologics every time they moved, but occasionally set off the torpedo detector, due to the many frequencies produced. We couldn't get that repaired soon enough!

03-13-18, 06:55 PM	#6
C-Wolf Watch Join Date: Dec 2017 Location: New England Posts: 30 Downloads: 2 Uploads: 0	In real life, hull compression and expansion when changing depth makes minimal noise and isn't a classification cue unless you're in a (very) close trail, which causes an acoustic phenomena called Near Field Effect. Transients from plane movement can occur, depending on the boat, but aren't common. We spent two months with fairwater planes that not only sounded like biologics every time they moved, but occasionally set off the torpedo detector, due to the many frequencies produced. We couldn't get that repaired soon enough! __________________ Sagire, Classis, Destructum!