Re: volume and hearing

[t-mu <tkorpipa@xxxxxxxxx>]

> From: caleb.k@xxxxxxxxxxxx

> now somebody who actually knows correct me if i am wrong but i have
> read in a number of places that permanent hearing damage is done but
> multiple and regular exposure to extreme volume...ie a work person
> with a jack hammer 8 hours a day 5 days a week...or a sound guy doing
> live gigs with a rock band every second night for 3 months kinda
> thing. hearing damage as i understand it is not caused by one loud
> exposure but will completely return after a few days.

to my knowledge it's a question of how loud AND how long. think of it as
'dosage' (sp?). there's a certain time for each amount of noise/sound what
is considered as being 'safe', like (if i remember right) the normal club
rating about 90-100dB is "safe", meaning it's safe for 4-5 hours, after
that, it's propably harmful. higher dB = shorter 'safe' time.

and then you have to think about sound spectre, this mainly applies to
A-weighted meters, what monitor mainly the middle, or 'speech' frequencies,
what are the most sensitive in human ears (lowest pain treshold = most
fragile hearing). 


 t-mu

]]] tkorpipa@xxxxxxxxx                  [[[
[[[ "james bond is now known as EMINEM" ]]]