after a really long session with all my toggels up, i couldnt sleep because i still had the drone in my head :x
so i found this page on the US forums
http://boards.cityofheroes.com/showf...part=1#3796307
and have never been happyer 
i put:
miasma_loop.ogg
obsidian_loop.ogg
whirlwind_loop.ogg
in ...\City of Heroes\Data\Sound\ogg\powers
and the headache stopped 
After 50 lvls with the Unyielding dronnnnnnnnnnne, you learn to mentally block it.
Well, they're going to change it in a patch or two so it will just loop few times and then silence.
If it lets you sleep any easier, the scrapper set seems to have been changed so that sounds now fade. Maybe the Brute set will be changed soon too.
Octavian Vanguard
@ohmsEU and @ohms 2
Badging character: Bimble on the Union server, Badgehunter.com and City Info Tracker.
It already has been.
I take it I can refer those people that moan my mastermind bots are too noisy to that thread aswell 
Thanks god for that it has finally been changed.
I can play with sound again
I notice it doesn't seem to be in the patch notes though. Nlo surprise there though.
my ss/dk brute is fun but the dark armour is annoying me ALOT and i wonderd if there was making it quite without turning my sound effects down.