[PSUBS-MAILIST] VAST underwater Comms unit [Was: Facebook pics and posts]

[Jon Wallace via Personal_Submersibles]

 I suspect it was more a case that Kittredge found a 22 Khz transducer source for a good price.
Jon


    On Sunday, November 8, 2020, 06:21:59 PM EST, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 At 22 kHz, it looks like they put the acoustic carrier just beyond human audible range (typically 20 Hz - 20 kHz), which makes me wonder if they wanted to keep the frequency as low as possible otherwise, perhaps to maximize range or limit multipath interference?

Sean

-------- Original Message --------
On Nov. 8, 2020, 15:15, Brian Hughes via Personal_Submersibles < personal_submersibles at psubs.org> wrote:


River has mine for now, checking to see how big a deal or if possible to reverse engineer it. At 22 kHz it's an oddball com system.
Brian
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