4 ms·

Beam still has to be in the direction of the mic, which wouldn't help if your body is blocking most of the direct waves. You get some scattering, sure, but I th

Beam still has to be in the direction of the mic, which wouldn't help if your body is blocking most of the direct waves. You get some scattering, sure, but I think ultrasonic is pretty absorbable, right?

ris 5y ago
But the same is also true for rotating the bracelet isn't it?
- pepoluan 5y ago
  The bracelet does not have directional speakers, so the ultrasonic waves will kind of spread everywhere, bouncing off hard surfaces, and ultimately reaches the eavesdropping device.