Exposure to moderate sound and temporary hearing reduction - permanent damage?

I like driving with the window down, and I like target shooting. After driving with the window down my hearing is worse for a short period of time afterwards.

When I shoot I wear good plugs and good muffs on top, but I still realize that exposure is cumulative.

So there are really 2 questions;

#1)Is the hearing loss I suffer from driving harmful, or a beneficial natural reaction?

#2)If it's not harmful, could I use it as a third level of hearing protection when shooting? IE drive to the range with window down, then put in plugs and muffs.

[txtony]

the reason you have noticable changes in hearing is that you get the popping effect when you drive with windows up or down, my point is there is a measurable change in air pressure, like when in an airplane, chew gum see if it helps, and i do agree when your out target shooting, wear earplugs,and earmuffs, probably ear plugs are sufficient but when shooting with a high caliber weapon decibels do increase. take care of your hearing.

[luckyorwhat]

Thanks!