JAKE'S EHPRA 2.0

[Benjamin]

Are you sure, Ben? because I remember reading somewhere that US track can penetrate the ear though in noisy places, like at a party. However, it is true with a masked track

Hmm Shannon has said that about US so you may have a point.

Great so I'm assuming even if I sleep on my side, and my ear is on the mattress/pillow it won't make a difference - which was something i wondered a lot about lol

It 'may' make a difference but agonizing over a perfect speaker arrangement is just going to do your head in. I wouldn't think it would be a huge difference.

And yeah that's the best way to calibrate ultrasonic.