Which Headphones?

[JackOfHearts]

http://subliminal-talk.com/Thread-Headphones-for-sleep
I have an internal trigger that wake me up when the sound is not there anymore. I never woke up with the headphone off the morning.
I think it's like a reverse alarm when the sound disappear I wake up.
I woke up less and less often to to put my headphone back on so I guess I get used to sleep like that.

In your case you're special

uh, i am just use genius speaker s-110 which is stereo, is that aplicable using ultrasonic on that speaker?

Maybe but I doubt it because your speaker must play frequency between 20hz and 20khz. You should not hear anything when you play the subliminal on the speaker(unless you have high frequency hearing ). You must play the ultrasonic very low because you could damage your hears if you play it too loud.
Read carefully the instructions before playing the ultrasonic unless you want to be deaf. Never listen to ultrasonic on headphone.
You can use the application FrequenSee available on the Playstore to calibrate the ultrasonic around -50db on your speaker.

https://www.google.com/search?q=sdfkjq&o...c&safe=off

http://subliminal-talk.com/Thread-I-m-so...8#pid47808

You can save my Google search in your bookmarks and use that to find the answer to most of your question. (you just have to replace the last 2 keyword by your own)