3 ms·

I wonder how long it will be until someone manages to figure out how to use image processing to read the noise seen by the camera sensor while the lid is closed

• unwind 8y ago
  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?
  • Johnny555 8y ago
    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.