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Also, doesn't the electronics in the phone already filter out everything outside the audible part of the spectrum, just because it is more efficient to do so (lower sampling rate = better performance / lower power consumption)?
A quick search indicates that <100 dB ultrasonic is legal. So make a phone cover that generates ~80 dB spread spectrum ultrasonic. That should be enough, right?
With the permissions system in Marshmallow, you can selectively disable microphone access, which is good. Those of us stuck on Lollipop will just have to be careful what apps we install.
Perhaps a tin foil hat would also work?
The acoustic attenuation of aluminum is good, but it would serve minimal use as a hat. If used as a sack instead of a hat, both sonic and micro waves might be reduced, which is probably better than wearing such stiff apparel.
Experts recommend wearing a minimum of three tinfoil hats.
anyone know of an app that can detect these signals? Maybe decode them. easiest way to block them is to know they are there in the first place. i am suspicious that occasionally my laptop makes high pitch noise correlated to mouse movements when its running windows 10. edit:Thinking about it. seems possible that might actually be facebook. never installed their phone app untill i had android 6 because it wants mic pe…
Couldn't this already be done with Wifi and/or GPS? Also, doesn't the electronics in the phone already filter out everything outside the audible part of the spectrum, just because it is more efficient to do so (lower sampling rate = better performance / lower power consumption)?
Is that really the case, or is the Ars piece suggesting I would be walking around with the advertiser's enabled app open all the time? (And I'd guess Android is in a similar boat.)
This is interesting. With the permissions system in Marshmallow, you can selectively disable microphone access, which is good. Those of us stuck on Lollipop will just have to be careful what apps we install.
I wasn't aware (and would be surprised if) iOS apps with microphone privileges could listen all the time, even while in the background, which is really what would be required in this situation. Is that really the case, or is the Ars piece suggesting I would be walking around with the advertiser's enabled app open all the time? (And I'd guess Android is in a similar boat.)