[aklug] Re: hacking with Sound

Imagine coupling this with something like an ef-111

Jim MacDonald

> On Nov 1, 2013, at 1:10 PM, Jeremy Austin <jhaustin@gmail.com> wrote:
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>> On Fri, Nov 1, 2013 at 12:14 PM, Jim MacDonald <jim@macdonald.org> wrote:
>> Not necessarily, it's possibly to do a frequency hopping transmission but limit the freq parameters to the inaudible range
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> Correct. I'm assuming ultrasonic is meant here, as infra would be hard to clock. Laptops have generally tinny speakers. :) For ultra though, it would have to be a fairly narrow band. While I doubt I can hear beyond 17k any longer as I grow older, that's not a whole lot of bandwidth. Plus teenagers can easily hear higher than that.
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> Article was sparse on the details.
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> jermudgeon

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Received on Fri Nov 1 13:14:08 2013