Active Noise Cancellation Device

Seimens is supposed to have these. The good ones are fairly expensive, and they are all very limited in performance. Noise is very complex, and all the situations are very random.

We would not even dare to take on such a project at our company, because of the wide parameters, and customer satisfaction factor.

Wouldn't it be cheaper to buy a pair of off-the-shelf noise canceling headphones?

Move house, its probably for the best ;-)

Chris

I heard it's next to impossible to get it to work well anywhere other than in a headphone set up. Even then I heard there are problem if the acoustics of the headphones aren't just right.

I had such high hopes when I saw ANC demonstrated with a wood chipper several years ago. I thought this technology was "right around the corner."

My fondest dream -- I want one inside my PC case. The fan noise is making me crazy, hour-after-hour, day-after-day.

To solve that 'problem' you don't need ANC. Buy yourself a remote KVM unit and put your PC in a place where you cannot hear it.

| I had such high hopes when I saw ANC demonstrated with a wood chipper | several years ago. I thought this technology was "right around the corner." | | My fondest dream -- I want one inside my PC case. The fan noise is making | me crazy, hour-after-hour, day-after-day.

Replace the fan. There are some which can vary the speed by temperature. And watch for the fan on the processor (if you have one). Some of those can sound like a locomotive wreck.

Power consumption, the associated heat, and hence the associated fan noise are three aspects of the same problem which is the bane of PCs.

I've switched much of my computing to Sun Rays to cope.

James Hill napisa?(a):

It's an advertisement, can't you see?! It's a spam! It's a trick with this noise cancellation...

BartMan

and

Hmmmm, check out the Fenton Silencer, you'll find it in Arthur C. Clark's "Tales From The White Hart" Ol' Fenton still had some glitches in it, but the story dates back to the forties! Regards, Tom

Try the Bose noise-cancellation headphones. They are fantastic. I tried them on a USA to Frankfurt flight a couple of years ago, and there was absolutely no plane noise when they were turned on, only the music I was listening to. If you turned the music volume all the way down, there was amazing silence until you took the headphones off. Expensive, but an engineering marvel.

H. R. (Bob) Hofmann

Time for a fluid cooled computer with an outdoor radiator, I proposed such a device as a project for an outfit I worked for 1985.

But the bane of PC's is not noise, It's Windows. I swear they wrote all the versions so far for the benefit of makers of spywear and viruses. Then they fix it with add ons, but they make your system crash, lol.

A day without cursing Microsoft is like a day without sunshine.

But can't you noise cancel the fan by putting an identical one over it, blowing the other way, ha!

Rocky

SNIP

A day without sunshine is like a night.

Ed