That's certainly an interesting thought, but do note (from the linked article):
In some of their experiments, the researchers used a high-speed camera that captured 2,000 to 6,000 frames per second..
I haven't checked, but I would be surprised if Apple uses cameras that are capable of that as normal user-facing webcams in their laptops ...
Recovering meaningful audio signal (which usually has lots of data above 1 kHz) from the <100 Hz sampling done by a camera seems difficult, Nyquist and all, right?
In other experiments, however, they used an ordinary digital camera. Because of a quirk in the design of most cameras’ sensors, the researchers were able to infer information about high-frequency vibrations even from video recorded at a standard 60 frames per second.
Comments
That's certainly an interesting thought, but do note (from the linked article):
In some of their experiments, the researchers used a high-speed camera that captured 2,000 to 6,000 frames per second..
I haven't checked, but I would be surprised if Apple uses cameras that are capable of that as normal user-facing webcams in their laptops ...
Recovering meaningful audio signal (which usually has lots of data above 1 kHz) from the <100 Hz sampling done by a camera seems difficult, Nyquist and all, right?
From the next paragraph:
In other experiments, however, they used an ordinary digital camera. Because of a quirk in the design of most cameras’ sensors, the researchers were able to infer information about high-frequency vibrations even from video recorded at a standard 60 frames per second.