5 Mar
2013
5 Mar
'13
1:45 p.m.
Re. Daniel Finlay re. resonant frequency of the diaphragm of the mic:
Sounds good to me, and since the mics in question are likely to be tiny
condenser mics with tiny diaphragms, the frequency needed would be
rather high, possibly above audible range (there's an equation for
calculating this). Higher frequencies are more directional than lower
frequencies, meaning that they can be "aimed."
It might be possible to use resonance to just outright destroy the mics
as well. (Think of an opera singer singing a note that shatters a wine
glass.) IMHO fair game, self-defense.
Consider a wearable device that includes a discreet "audio cannon" that
emits a chirp of a frequency above audible range, or perhaps a sweep of
frequencies, loudly enough for the resonance to break the diaphragm of
any non-consensual microphone within let's say six feet in front of you
and a radius of a few feet around the center of where the device is aimed.
People could also use this to destroy any concealed mics in their own
devices, for example the hidden mics in laptops. ("If I want to record
audio on my laptop I can plug in an external mic, and unplug it when I'm
done, thank you very much! ;-)"
This is basically just electronics, should be fairly easy to design &
build. Sine wave oscillator, amplifier, tiny audio transducer. Making
it wearable and stylish will take more work, and making it catchy enough
to go viral will be interesting. TV-B-Gone, anyone?;-)
-G.
=====
On 13-03-05-Tue 11:19 AM, Daniel Finlay wrote:
If you knew the diaphragm size of the microphone in
question, you'd be
better off just emitting its resonant frequency.
On Mar 5, 2013, at 11:16 AM, rachel lyra hospodar <rachelyra(a)gmail.com
<mailto:rachelyra@gmail.com>> wrote:
Wouldn't it need to be non-commercially
available music, so they
couldn't just find the audio data of the track, invert its wave, and
cancel it out of the recording?
CACOPHONY FOR THE REVOLUTION!
mediumreality.com <http://mediumreality.com/>
On Mar 5, 2013 10:23 AM, "Steve Berl" <steveberl(a)gmail.com
<mailto:steveberl@gmail.com>> wrote:
You could carry a boombox around playing loud music where ever
you go. Perhaps this would be the end of earbuds. :-)
On Tue, Mar 5, 2013 at 10:20 AM, Anthony Di Franco
<di.franco(a)gmail.com <mailto:di.franco@gmail.com>> wrote:
People have rendered surveillance cameras useless with very
bright IR LEDs in their fields of view.
Could something similar be done for sound recording devices?
On Mar 5, 2013 6:17 AM, "Anon195714"
<anon195714(a)sbcglobal.net <mailto:anon195714@sbcglobal.net>>
wrote:
Yo's-
Something I forgot to add re. DARPA's desire for
universal recording of
face-to-face conversations.
What's the ideal device for doing all that recording?
How'bout something you wear? How'bout something that
"everyone" wears?,
or even a significant fraction of "everyone"?
Like maybe Google Glasses.
Always on, camera and mic always "connected" to "the
cloud." Orwell's
telescreen gone mobile.
Everyone who wears them will become, in effect, _unpaid
surveillance
drones_ watching their family and friends, not from up in
the sky, but
from up close where every word can be heard.
Some will say "oh, there's no stopping technology."
People said that
about the atomic bomb and the hydrogen bomb. But public
outcry led
first to treaties and then to progressive degrees of nuclear
disarmament. We haven't used that technology since it
was first used in
WW2.
We can stop pernicious tech if we choose. We can refuse,
we can
withdraw consent, we do not have to press the Buy button.
Technology should liberate and empower people.
"Conveniences with a few
strings attached" are not liberation, they're puppet-strings.
It's all about control: technology that you can control,
vs. technology
that can control you.
-G.
=====
On 13-03-05-Tue 1:50 AM, Anon195714 wrote:
http://www.wired.com/threatlevel/2013/03/gps-drug-dealer-retrial/
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Yo's-
This just in:
"DARPA wants to make [voice recognition/transcription]
systems
so
accurate, you'll be able to easily record,
transcribe
and recall all the
conversations you ever have. ... Imagine living
in a
world where every
errant utterance you make is preserved forever.
...
DARPA [awarded
U.Texas comp sci researcher Matt Lease]...
$300,000...
over two years to
study the new project, called "Blending
Crowdsourcing
with Automation
for Fast, Cheap, and Accurate Analysis of
Spontaneous
Speech.""
"The idea is that business meetings or even
conversations with
your
friends and family could be stored in archives
and
easily searched. The
stored recordings could be held in servers, owned
either by individuals
or their employers. ... The answer, Lease says,
is in
widespread use of
recording technologies like smartphones, cameras
and
audio recorders...
[A] memorandum from the Congressional Research
Service
described [an
earlier DARPA project of this type known as]
EARS, as
focusing on speech
picked up from broadcasts and telephone
conversations,
"as well as
extract clues about the identity of
speakers" for "the
military,
intelligence and law enforcement
communities.""
http://www.wired.com/dangerroom/2013/03/darpa-speech/
(Yes, "real
geeks
don't read Wired," but nonetheless its
news pages are
useful for keeping
a finger on the pulse of Big Brother and his
corporate
Brethren.)
In short:
DARPA is researching the means by which every
conversation you have,
in-person, whether at work or with family or
friends,
gets picked up by
the mic in your smartphone or other portable
device,
and stored on a
server, where DARPA's algorithms and human
editors turn
all of it into
fast-searchable text, that could be used by your
employer, the military,
law enforcement, and intel agencies. Presumably
the
credit bureaus,
insurance companies, and financial institutions
will
want "in" on the
data as well.
Now connect that with this, about cell-site tracking
and call detail
records:
"The government maintained [that] Americans have no
expectation
of
privacy of such cell-site records [call detail
records
or CDR] because
they are in the possession of a third party ---
the
mobile phone companies."
The key point is that the gov's current position is
that data
stored on
a third party's servers have "no
expectation of
privacy." What begins
with CDR will eventually include voicemail
messages
stored on the mobile
phone companies' servers, and then eventually
all of
your live in-person
conversations that are stored "in the
cloud."
"Anything you say can and will be used against you..."
Mark
my words.
Meanwhile people keep using gmail and Google Voice, and
smartphones
from
which they can't remove the batteries.
Because nothing
is more important
than "convenience," right?
As a character in a sci-fi piece I wrote in the
mid-1980s said,
"Why put
a person in prison, when you can put prison in
the
person instead?"
>
> -G.