6 ms·

Quite sure the microphones on any smart speaker or phone do not have the build quality to 'hear' near ultrasonic audio.

• mrob 4y ago
  Near ultrasound audio doesn't need any special microphone. I just tested with my Samsung Galaxy S3 (i9300 version) and it has no trouble detecting 20kHz. I don't see why newer phones couldn't do the same.
  • IndySun 4y ago
    20kHz is not ultrasonic.