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'

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.