well, you could always go up to a .50 and shoot it often without hearing protection in calm enviroments..like a car port. Enough of that and you will surely bearly even hear your .223 next time.
but seriously, i find any .22lr to have a tone to it, even inside that sings out and goes away just as fast. little to no hazy hearing after.
all things considered just stick some .25 cent earplugs in your ears anytime you discharge anything.....well....firearms..