[aklug] Re: hacking with Sound

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
>

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.

Article was sparse on the details.

jermudgeon

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Received on Fri Nov 1 13:11:31 2013