This happened to me last week while doing squats in a cardio sculpture class.
I stopped for a few seconds for my hearing to come back, when it did I kept going. On another occasion it happed while running suicides on a tennis court.
http://www.hearingcenter.com/services/sud_hl.html
read the article, you will find some answers there
He stopped working out in that way. He's a Rugby player, and if you know anything about Rugby, these guys are like cavemen. They run around on broken limbs. ;D He hasn't had a recurrance since he stopped lifting weights.
I don't know how to explain it physically, but there's something about being in one place lifting weights that caused this in both you and my son.
No supplements. I stretched, warmed up and got my circulation going, and I was standing upright doing alternating dumbbell curls to target my biceps. I had just finished the first set when this happened. I guess it is possible I could have over done it seeing as this is only the 4th or 5th time I’ve worked out.
I was a smoker for 7 years up until 5 months ago, which caused me mild heart palpitations, so at first I suspected some sort of heart issue when my hearing went, but I recall checking my pulse when I lost my hearing and it was strong, regular and steady.
Did your son’s episodes ever stop?
Are you eating properly? Are you taking weird protein supplements sold in the gym?
My 17 year old son had episodes where he lost hearing during weightlifting, and then it got worse - he began fainting.
After exhaustive tests, the docs said if you start to lose hearing, STOP. You're doing WAY TOO MUCH.
Interesting, this stuff happened to my son when he was on his back lifting weights. You don't say that, but it sounds like that's what you're doing too? If so, you're doing too much.