The big put-off for many people when it comes to noise-cancelling headphones is size -- these headphones are often excessively bulky. Audio Technica may have the answer with the active noise-cancelling ATH-ANC3 earphones.
These 'phones offer the same cancellation benefit of their full-size brothers, but at around £75 and many, many times smaller, they are potentially a very attractive alternative.
Audio Technica's iPhone-compatible ANC3s aren't just noise-cancelling, they're also sound-isolating. They achieve this by using soft silicon tips to sit nice and snug in your ear canal. To ensure a good fit, AT supplies tips of various sizes. We found them fairly comfortable, too. The large portion of the 'phone was noticeable to us, and we felt average fatigue after a few hours of continued listening.
While the earphones themselves are lightweight enough, the in-line battery compartment is not. You'll definitely notice it's there. We found its clip very useful -- clipping the battery pack to our jeans pocket while anrested inside the pocket let us forget about the weight completely, as it felt like it had been removed. Certainly, it's not a pair of 'phones to consider for the gym or jogging.
A combination of noise cancellation and sound isolation makes these a unique pair of earphones. The electronics in the battery pack actively monitor ambient noise around you -- air conditioning, rumblings on a train, wind rushing past a window -- and use a clever technique to 'cancel' it out so you don't hear it. The sound isolation, on the other hand, keeps all the sound being produced by the 'phones in your ears, so it doesn't leak and allows you to keep the volume lower without losing any perceived loudness.
Should your trusty battery expire mid-album, the ANC3s can be switched to passive mode, allowing them to function as normal sound-isolating earphones -- a job they're quite good at. A button on the battery compartment, when depressed, hushes your music to a level quiet enough to allow you to talk to people or indeed yourself, should you be so inclined.
The sound-isolating/noise-cancelling duality makes for an impressive earphone. In the office, the air conditioner was completely silenced and voices all but nullified.