uh no, why would a charger make a noise for, i would get that replaced unless you want a fire, who knows what might be wrong with it, it could short out and burn your house down.

 

My DS Lite AC adapter does make a faint noise, just like every other electrical transformer, but I'd hardly call it a screech. It's more like a hum.

 

I hear the screech is it is always less than 1 metre from my ear when using the computer. I might not be able to hear it for long if I keep listening to my iPod as much as I do.

 

My 1st and 3rd party charger don't make any noise.

I guess you're sharing the plug with too many devices resulting in electrical noises. Have you got a UPS device in your home? Try to connect the charger to that thing and see (or hear) what happens.

 

I've always been able to pick up such noises much more easily than everyone else for some reason - the TV can be on mute but I can tell it's on from the other side of the house. I'm an adult as well, so there goes that child/high frequencies theory

Other stuff that makes noise:
Router
Alarm clock (with no alarm or radio on)
...Can't think of any more right now.

I must say I've never noticed my DS/GBA chargers making any noise though.

 

It's not a theory - hearing declines with age (especially at the top end).

Those under 25 can hear high freqs much better than those over - hence those "mosquito" systems that are used to disperse "gangs" of kids in certain areas of the UK.

I'm over 25 and can still hear them too, even with my bad hearing.. =]

 

I'm 14 so this goes with the theory, my parent can't hear it.

 

My hearing is bad. If a noise is both faint and high frequency, I probably can't hear it.

 

7, so people younger than you 6 or younger?

 

Mine's whines when plugged in my bedroom but not when it's plugged in the living room - go figure!