Thatās true. I donāt listen to ultrasonic subliminals with headphones. Your right if your canāt hear anything you donāt know what volume itās playing at and can damage your ears cause you donāt know how much volume your usingā¦
But i do listen to hybrid subliminals with headphones because i know how loud it is. Audible volume is same as ultrasonic part. But even those should be played at least volume through headphones, hence the advisory i posted. Thereās actually no need to be loud since no other sounds exist at that frequency range, your mind hears it clearly. Also the volume is low.