To a 20 year-old with normal hearing, this is how music sounds.

To a 22 year-old after 2 continuous years working in 95 dB(A), this is how music sounds.

To a 40 year-old after 18 continuous years working in 95 dB(A), this is how music sounds.

A 65 year-old after 25 continuous years working in 95 dB(A) can barely hear the music.