Re: [android-developers] Recording High Frequencies

On Wed, Mar 14, 2012 at 7:44 AM, Jim Graham <spooky130u@gmail.com> wrote:
> On Tue, Mar 13, 2012 at 01:06:55AM -0700, Aledis wrote:
>
>> I need to record frequencies about 17kHz. I'm using MediaRecorder like
>> this:
>
> You do realize, I hope, that most humans, by the time they're 18 or so,
> have lost all hearing about around 16 kHz, right?

Actually, there still may be value in receiving such signals. Not sure
about MediaRecorder, but I can definitely think of places where
AudioRecord of ultrasound would be useful.

For example, the jaja active stylus uses ultrasound for communication
between the stylus and the device. AFAIK, they don't have an Android
SDK yet (they started with iPad, natch), but when they do, AudioRecord
would be their mechanism for picking up their stylus signals.

http://www.kickstarter.com/projects/jonatherton/jaja-worlds-first-pressure-sensitive-stylus-for-ip

All that being said, since I would have assumed that Nyquist was the
inventor of Nyquil, you can tell that I'm out of my depth on audio
recording... :-)

--
Mark Murphy (a Commons Guy)
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