[ARC5] ARR-3 Question

[Tim]

It's true - Our sonar techs often used their own personal "hi-fi"
headsets.  Lots of interesting data at the high end (masked by all those GD
shrimp !!!)  ;o)
A good sonar tech could hear a "Fish Fart in Fiji"....

Sonoluminescence is some very interesting Physics Bugga Bugga.......

Tim
N6CC

On Wed, Feb 10, 2021 at 11:47 AM Tom Lee <tomlee at ee.stanford.edu> wrote:

> There is a surprising amount of high-frequency content. I’ve been told
> that there are micro bubbles that form and pop with great suddenness,
> generating a rich, high-frequency hash that helps the signal to pop out
> above all the other noise.
>
> —Cheers
> Tom
>
> Sent from my iThing, so please forgive typos and brevity.
>
> On Feb 10, 2021, at 11:40 AM, Hubert Miller <Kargo_cult at msn.com> wrote:
>
> 
>
> Well, how interesting. I would have thought the sonobuoy pickup were all
> low frequency sounds.
> I think I recently read, in a book about the Battle of Atlantic, the
> 'propeller cavitation sounds' were
>
> up around 17,000 Hz ?
>
> Lacking smarter inputs, I would have guessed it was some kind of
> contractual moneymaker.
>
> -Hue
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