Instead of berating us for not answering an extremely obscure question,
you should have use Ms SearchBox first, like I did to determine whether
these are real subjects.
On 2/28/2018 5:31 PM, Etienne Robillard wrote:
If ultrasonic side channels are a threat to privacy, it is because smart
phones were designed to exploit this precise feature.
(Near) Ultrasonic beacons are apparently a real and rather sneaky
tracking mechanism.
https://www.schneier.com/blog/archives/2017/05/using_ultrasoni.html
This is actually about using near-ultrasonic, 18-20 KHtz, which can be
produced by some TVs and other off-the-shelf gear and detected by phone
microphones. Read or ask *them* about what android/Dalvik system calls
they used to access phone microphones.
Investigate for yourself whether any Python implementations for Android
give you such access.
A great number of studies have shown that ultrasonic neuromodulation of
the central nervous system can be exploited via brain-computer
interfaces...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4981830/ is a review
article about clinical use for brain and nerve stimulation in patients.
I am rather sure that they are talking about *real* ultrasound, well
away from the audio range. So this seems to be a completely separate topic.
--
Terry Jan Reedy
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