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Ad Networks Using Inaudible Sound To Link Phones, Tablets and Other Devices (arstechnica.com)
ourlovecanlastforeve writes with a link to Ars Technica's report of a new way for ads to narrow in on their target: high-pitched sounds that can make ad tracking cross devices and contexts. From the article: The ultrasonic pitches are embedded into TV commercials or are played when a user encounters an ad displayed in a computer browser. While the sound can't be heard by the human ear, nearby tablets and smartphones can detect it. When they do, browser cookies can now pair a single user to multiple devices and keep track of what TV commercials the person sees, how long the person watches the ads, and whether the person acts on the ads by doing a Web search or buying a product.
And why can a rogue website or app access the microphone? Oh yeah cuz android.
They pull crap like this and then have the gall to say adblock users are evil?
IANAL, but I was wondering if this would be illegal under wire-tapping laws. A quick glance over the code (18 - US 2511) actually specified "oral" not "audio" communication. Would this then be exempt?
I suppose any app that takes advantage of this would have a disclosure about the recording buried deep in its legalese.
1. Mics don't pick up ultrasonic
2. Speakers don't reproduce ultrasonic
3. And even if these somehow did, Nyquist already limits it all
Look at a high-end mic's response curve. Most barely get above 16 kHz, after which they drop off very fast. Compare that to any system that may be attached to a computer. Same for a loudspeaker. High-freqs are directional, meaning if you get off-axis even a little, even more drop-off. All BULLSHIT. The internet at play and the eager ignorants ready to believe anything it proclaims.
Sounds like it might be time for an Ultrasonic Jammer in my house. They have them to supposedly keep pests away. I'm sure it would blanket the area and disrupt any ultrasonic tracking. Hopefully they won't bother the family pets too much. http://amzn.to/20SJgu6
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If you RTFA, you'll note that no one actually says this is happening yet.
This is about a complaint filed with the FCC to prevent the use of this technology. One company, SilverPush, is cited as having developed the technology and details about it are in the public view, but that's the only case where there's even anything to cite about this form of intrusive technology.
You can let your hackles go back to their normal position now.
Ultrasonic response is not something most devices are good at. We, unsurprisingly, tend to design your sound systems around what we can hear. Particularly when you are talking cheaper equipment the high frequency response of speakers and microphones is often not very impressive. There's also the issue that the digital audio compression we use for things, like TV broadcasts, deemphasizes high frequencies.
So for this to work they need:
1) A TV broadcast with sufficient audio bitrate to get their high frequency signal encoded (the AC-3 streams usually used in ATSC broadcasts can be any bitrate from 64kbps to 448kbps).
2) Encoded in such a way by the broadcaster that the high frequencies are preserved to a sufficient amount that their signal isn't distorted.
3) Reproduced by speakers good enough to produce their signal, but to do it at a sufficient level to be picked up (speakers roll off at more extreme frequencies).
4) Picked up by a microphone with sufficient range to be able to receive such a signal and isn't being occluded too much be being in a pocket or something.
5) Processed by a program running on the device, that has control of the microphone at the time the signal is playing.
Ya... While that isn't impossible, that is not likely to work any real amount of time. To have any good chance of working you'd probably have to push the signal down in to the audible range, which would of course piss people off to hear spurious high frequency noise. Likewise for it to be of any use the user would need to have an app on their device that is running. The mic doesn't magically record everything that comes in and store it for anything to access. A program has to be running and take control of the microphone to be able to get any input from it.
This sounds like an advertiser pipe dream, not something that has been tried with real technology in realistic settings.
People seem to think that ultrasonic communication is some kind of magic. It isn't. I mean it can be done, no question, you can encode information in sound, and you can do it in sound frequencies above human hearing. However that doesn't mean you can do it with any arbitrary device, or under arbitrary conditions.
there's no "Decline forever" option.
Yes there is. It is called death and is a part of nature.
Well people --- you're just in a pickle because you've let 'em abandon THE SWITCH. How was grandpa sure he could get some shut-eye without the vacuum cleaner going round in circles? How'd we know that when we flicked on that AM radio, the batteries in it would be just as good as we left it? When we put down the phone how'd we know the gub'mint wasn't listening? We had honest to God switches, little bits of metal with springs that snapped 'em so far apart those electrons would just stay put.
Now all you have are little copper titty-buttons on the sides of things, and you've got chipsets to manage the buttons, see? And everything is really connected all the time to these chips, and it's all programmable. It's all flashable. It's all exploitable. There was a time when people liked switches on things because they liked control. You could actually beat your competition if your thing had more switches than your competition's thing, even if some of them were silly. But something changed, and now consumer focus groups and product design engineers try to eliminate as many controls as they can. When we started seeing switches disappear from things we thought engineers were stupid. Turns out engineers were doing it because they thought people were stupid.
If you think you have a Power button that's an actual Power button --- well you don't really. There's probably a timer in there somewhere I could exploit to tell your thing to turn on again. And why would I bother? I could just take control of your thing and make it sing and beep like it's shutting off and once you see that dark screen you'd be none the wiser.
Sometimes I used to send a WAKE-on-LAN packet to my buddy's computer the moment he sat down at his desk in the morning, just as he was reaching for the power button. He'd hear the computer beep and withdraw his finger, puzzled. Took him a while to figure out what was happening.
We now worship the Golden Calf of the Software Sandbox... and we expect our devices to be on their Super Duper Boy Scout Best Behavior. Hope that works out for everyone, but I don't want to hear any whining when shit happens. Google offering a 'Decline Forever' button,
Shoo Google, don't bother me,
Shoo Yahoo, don't bother me,
Shoo Amazon, don't bother me,
Nothin' ever turns off
and I ain't gonna pay
gimmie everything for free.
I'm going to thwack off the MONSTER FRANKENSTEIN KNIFE SWITCH that I have all my modern tech wired to, and get some serious shut-eye.
NO CARRIER
<blink>down the rabbit hole</blink>