Can you trust your ears - this is a pretty good primer on why/how the human perceptions can be tricked Please Register or Log in to view the hidden image!
Interesting but if you don't look at the video you will find you are able to discern and not discern.
You will find you are able to discern and not discern the difference... that still really doesn't make sense in the context here...
To contemplate that ours senses are flawed has always been obvious. Who here , or anywhere has the spectrograph ability. None.
Just FYI, "spectrograph ability" doesn't mean you can see ghosts. It's related to spectrum, not spectre.