What am I missing? There seems to be zero noise cancellation?
1307684
I found this same issue and resolved it. If you switch between bypass mode (to listen to music without noise cancellation) then to Normal mode, the headphones put the volume all teh way down so that you can't hear your music. You simply have to turn the volume up in Normal mode to listen to music. These headphones work much better than my old folding PXC-250 Sennheiser headphones.
1307685
Maybe it is one of these 4 items that is outa' whack. Make sure: 1. Talk Through is not activated(green light off & red light on). 2. You have a good AAA battery installed. 3. The slide switch on the left side is in Normal position. 4. The little red light on the right side is ON by pressing ON/OFF. With that you should be good to go! Easy-Peezy... GL
1307686
I made sure the battery was good and the notice cancellation works well.I also have a boostaroo amplifier which cost about $7.00. Between those 2 things I get decent noise reduction.The Bose get better noise reduction but the Senheiser head phones are better in every other way.
1307687
I have the same issue. The noise cancellation on this headphone is substantially inferior to the Sennheiser PXC 250 and the QuietComfort 15--both of which I've owned and used for years. There is virtually no difference in noise reduction between "Normal" and "Bypass" modes, and Talk Through introduces more noise than is present without the phones. I just cannot accept that Sennheiser would create such a poor product; certainly my set must be defective.
1307688
There's a small hidden black switch on top of the right speaker. Flick it into 'normal' position, then keep the On/Off switch pressed till you see a red light. Red light indicates that the headphones are in active noise cancellation mode.
2228763
the noise cancellation works without reducing the audio, giving a sense of presurisacion to headphones
1080308
I use the noise cancelation feature on planes all of the time and I have never heard that. Maybe the cable is bad or a bad connection maybe? Does it crackle if you twist the mini plug on the headphone side or phone/ipod side? They definitely should not do that. Maybe, maybe bad batteries could cause that too.
914828
its not noise canceling, its volume control. it limits how loud the headphone volume can get to avoid eardrum damage in kids
162521
Nope, it is not noise cancelling. For noise cancelling, you can look at bose. http://www.bose.com/controller?url=/shop_online/headphones/noise_cancelling_headphones/quietcomfort_15/index.jsp
635127
Yes the noise cancellation does work even if you are not listening to anything. You do need to wear the heradphones and have the Bose device switched on.
37307
Yah you might have a faulty pair. Mines work just fine with the noise cancelling activated.
1963208
I disagree with other comments here. I don't have my music quiet, per se, but yes, others next to me can hear sound from my headphones. They do completely surround the ear, but that is not the same as sound-cancelling.
1137255
They have active noise cancellation that requires recharging. I suggest that there is some other sort of signal processing happening also. The charge seems to last well if you remember to unplug the cable from the headset.
1906627
No Noise cancellation and they are insufficient to keep out the noise while watching a movie on the plane. The headphones were great except for that, so I returned them. I tried the Sennheisers But they were very poor noise cancelling and the V-Moda which were excellent except they were "noise-lowering" or some such thing and kept no noise out. After buying and returning all of these, I went back to my Bose Quiet Comfort 15's which were still the best of the bunch. I will wait for the next gen which will be noise cancelling AND bluetooth.
1780677
I don't know if the minimum setting is actually off, but it is so low you can't hear anything!
900913
noise cancelling is not = to mute. You still hear but the external sound is greatly reduced & is MUCH lower.
62069
I've never noticed mine to make any noise at all. When I checked again just now, I put my ear right up to the camera and could barely hear a little hum.
1482336
The headset does not have noise cancellation so background noises are picked up, but I didn't notice much in the way of the device adding sound or noises to recordings. Please note - I am using teh headset for telephone communication and recording phone messages are not very high fidelity.
272719
I am using them on my Galaxy S2 running Jelly Bean & have no problems hearing them with noise cancellation on. Did you try inserting new batteries. Also do you see a red light on your ear buds when noise cancellation is on? The buds plug into a standard headphone jack & have nothing to do with the phone OS. If you can hear other headphones on your phone fine, but not the NC20s, then just return them & ask for a replacement.
626171
No, not sound cancelling. Still, they do pretty good job in isolation from ambient sound.
1689858
Yes, its overwhelming. This device has no noise canceling ability whatsoever.