They don't as a general rule - some may have injured their ears whilst diving as a result of poor equalisation while descending.
Sometimes when people have been doing a lot of diving they can get infections which are generally temporary but if not attended to may cause permanent damage.
yes they have very bad hearing
No, they have excellent hearing but poor eyesight.
What?
no
Armadillo's
No.
They can be bad for your hearing if they are putting out more than 105 dB. 10 minutes of noise at 105 dB can damage your hearing. Though minor damage can be repaired by itself, repeatedly getting minor damage adds up to major damage and hearing loss.
A bubble of divers
Shadow Divers was created in 2004.
Skin divers are people who dive into the ocean without using special equipment, unlike Scuba divers.
85 dB is bad for extended periods (8 hours). 100+dB is bad nearly instantly.
Maybe it is bad for your hearing in later years.