3 ms·

I previously have read that it's more specifically heating and cooling of the inner ear itself.

• sudosysgen 5y ago
  It's the entire head that is being heated, but perhaps the inner ear is the critical spot.
  • R0b0t1 5y ago
    The entire head is being heated, slightly, but it can only cool by dissipating that heat to the environment. This happens slowly enough I do not see it as possible to achieve audible frequencies with such a heating/cooling cycle. The auditory effects have to be generated by RF, possibly frequency phased modulation, interacting with the inner ear.
    • nitrogen 5y ago
      The ear could be acting as a high-pass filter, so you don't need to cool, you just need to vary the rate of heating. Of course, that would mean that the temperature would be rising over time.