On Thu, 7 Mar 2019 15:57:56 -0600, Chris Caudle wrote:
>On Thu, March 7, 2019 2:23 pm, Gerhard Zintel wrote:
>> For sure you can tune such a system to be efficient in
>> a small frequency range.
>
>The article mentioned "a" high pitched tone, singular article in
>English implying single frequency or small spread of frequency. Does
>not seem likely to be useful for music use, might help for machinery
>with a specific annoying high pitch frequency.
Not for music, a "valuable" use case is provided by this article.
On Thu, 7 Mar 2019 21:23:31 +0100, Gerhard Zintel wrote:
>April 1st seems to be very early this year?!
This was my first thought, too.
Today is International Women's Day. I hope quoting a women isn't sexist.
"Drones are a very hot topic," Zhang says. Companies like Amazon are
interested in using drones to deliver goods, she says, and "people are
complaining about the potential noise."
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Received on Fri Mar 8 08:15:01 2019
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