[ARC5] ARR-3 Question

[Tom Lee]

Ah, yes, the famous snapping shrimp! Indeed, the physics is amazing!

Tom

Sent from my iThing, so please forgive typos and brevity.

> On Feb 10, 2021, at 1:06 PM, Tim <timsamm at gmail.com> wrote:
> 
> 
> 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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