02-07-2014, 01:56 PM
Okay, if I'm not mistaking, you need some proof that the sound "is there" even if you can't hear it. Your visual acuity may be of more use if that is the case. Just get an app like FrequenSee, which tells you how loud the ultrasounds are. Compare that to a "hearable" tune to get an idea of how much of a hard time you actually give to yourself.
