Ultrasonic volume - the definitive answer

[Ricardo]

Here is what FrequenSee tells me about the usage patterns I have for myself.

Maximum volume: 12/15 on my phone (Samsung Galaxy S4). This is approximately -23 dB peak volume at the source. Discrepancy from previous answers comes from the fact that I'm reading these on a scale starting at 0 and dropping, instead of rising. This volume is what I usually use on my phone at night, phone either on nightstand or next to me.

Standard volume: 9/15 on my phone. Approximately -27 dB peak volume at the source. This is what I usually use on my phone during the day, phone in arms reach.

Low volume: 7/15 on my phone. Approximately -33 dB peak volume at the source.

Volumes below 7 are useful, but are not as powerful in dealing with resistance.

This is not necessarily an endorsement for the use of these volumes. It's what I use, and I share it for educational purposes only. If you try them and these volumes are too loud, or you experience ringing in your ears, use the standard method for calibration.

I have to play the silent at between -60 and -70 at the source (laptop) to not be disturbed by the beeping sound. Is my subconscious able to pick up the messages with this volume?

I always play ultrasonic at -30dB in my home or ~-40dB at night by my bed. I don't get any headaches or nausea although I can sometimes feel restless at night.