I have to take Marshall's side on this one. Jeff pollutes many of the post on this site saying the same thing over and over. If you disagree with him, he will belittle you and tell you that you don't understand. He never offers up any creditable science or proof, just offers up his mentors who interestingly enough have never offered up any either.
I feel like I'm arguing with a close minded child when dealing with Jeff and it is getting very tiresome.
I agree with Marshall on a hearing test for Jeff. Not once has he offered up any proof beyond his hearing. If Jeff is to have any credibility than he must prove that his hearing is supernatural. And than of course we must find out why that none of this can be measured with instruments.
I know the US Navy can identify almost any ship out in the seas a half a world away from the sonic signature of the prop. Even two seemingly identical ships will have slightly different sonic signatures.
Anyway, I'm tired of posting on this board and having Jeff crap in my threads.

BillWojo