That's an excellent write-up on the affliction tinnitus coming from Odense University Hospital, "the largest and most specialized hospital in southern Denmark."
It mentions cases referred from an otorhinolaryngolost ...... a specialist .....
www.wikipedia.org/wiki/Otorhinolaryngology ..... someone for me to seek out.
This is just my opinion but it's probably the very loud noises like a pounding hammer or gunfire that has a percussion effect within one's ears that lead to tinnitus later on in life as opposed to loud motorboats out some distance on the lake.
Down the bottom of this report was a ......
http://www.medicalxpress.com/news/20...nitus-ear.html .... with a video from the Mayo Clinic.