Babies cry for a number of reasons and sometimes babies do cry hysterically which is normal.
Babies can cry because they are hungry, need a diaper change, are tired or just want comfort and attention from the mother or father.
Even some toddlers will cry hysterically which is normal and it's just a phase that they will get through as they grow older and older.
As long as the baby is fed, changed and not sick etc then there's nothing to worry about when the baby is crying hysterically.
All babies are not the same and will cry for different reasons and some babies cry more than others do which is also normal.
A baby crying is annoying and can drive you insane at times but a baby crying should not damage your ears or hearing.
The babies cries are not loud enough to really cause any hearing damage.
When my kids were babies I had to wear earplugs to help lower the crying noises when they were crying without needing anything.
The babies will eventually sleep through the night or stop crying as much through the day as they get older.
But then again as they get to the toddler stage they usually start screaming and crying again because they are frustrated or trying to get your attention.
I can understand that it gets frustrating hearing a baby crying or even a toddler crying no matter how much you love them.