it would all depend on the db gain output if there is any. so long as it isn’t getting high like say the mp3 105db
if it was in the 34-60db its impossible.
on the other-hand If the people talking in the call center are using exceptionally high volume when they talk and the lack of proper sound deadening… or particularly loud machinery running in the back ground.
more likely if it was noise related loss it was from things closer to home like vacuume cleaner. 80-90db tv too loud music too loud, blenders, certain engine noises related to being out of tune on car, mowers,
guess the point is if it was noise related loss it was from every aspect not just in the office. even though certain things in the office may have contributed.
are there any higher frequency db testers that are cheap as a means to track down things that are high frequency being too load?
it would help this person to track down the source if there is anything in their life currently that is contributing.
like maybe high pitch frequency of a dieing fan??
Anyway look over this chart anything from osha up is causing damage when exposed for any length of time higher the level the less time it takes to damage hearing.
I see teleconference room was around 90db average If this is the same as call center, which i do not know, never been in one, then without proper sound deadening your going to have issues. I doubt employers walk through there centers with a db tester to ensure its not too loud.
drop down to the “sustained exposure may cause hearing loss” On the right, its stuff in the home, note all of those are all “above” a teleconference room. db level. and amount of time exposed plays in. Also short accumulation over long periods of time does as well.