[Milsurplus] L.O. radiation / underwater noise

[J. Forster]

The comment about 'coated' is perhaps a clue. If the sub were coated with a
compliant layer, it would significantly reduce sound transmission by a big
mismatch in the speed of sound at the interfaces between the steel hull and
compliant layer, and again by the interface between the layer and the water.

Problem is, how do you keep a layer of rubber or some such, compliant under high
water pressure??  Glass micro spheres?

I don't know.

-John


Richard Brunner wrote:

> Re:
>  "The Seawolf has the highest tactical speed of any US submarine. Much of the
> > design effort was focused on noise reduction, and it is expected that the
> > fully coated boat will restore the level of acoustic advantage which the
> > US  Navy enjoyed for the last three decades. ....."