Noise-Cancelling Headphones for Constant Industrial Noise?

[Bobbie7]

I just came across this site (pc magazine) about headphones and hope this information helps. Best wishes.

http://www.pcmag.com/article2/0,2817,2115378,00.asp

 

[MountainCreek]

I am considering buying the new Bose QuietComfort 25 but then the oddest thing struck me. Since the microphones pick up external sound and produce a sound to counter this won't this increase the actual decibel level even though you cant hear it? I know this sounds silly but I just cant wrap my head around the concept even though I have tried several of these headphone. And please dont laugh at me, I'm really not that stupid, it's just that I'm evidently am a bit techincally challenged ;-)

http://www.amazon.com/Bose-QuietCom...16746759&sr=8-1&keywords=bose+quietcomfort+25

I have exactly the same question.

 

[GregCA]

I have exactly the same question.

The answer is no, it shouldn't increase the decibel level. Its job is to cancel out sound through destructive interference, so the opposite is expected.

 

[Newloud]

I was wondering the same thing. So what you get from noise cancelling headphones is actual silence?

 

[GregCA]

So what you get from noise cancelling headphones is actual silence?

Well, you know, there's a reason they are called "noise cancelling"
They allow you to listen at low volume since they cancel the external sounds, so you don't have to crank up the volume to drown them.