Sennheiser's sophisticated CXC 700 earbuds tout three levels of noise cancellation, TalkThrough functionality

Sennheiser has a thing for trotting out titillating new wares at the annual Consumer Electronics Show, and this year is proving to be no different in that regard. The audio specialist has just introduced one of the most fully-featured headsets we've seen in quite awhile, with the CXC 700 boasting not one, not two, but three levels of noise cancellation. The newfangled NoiseGard /digital technology gives owners a trifecta of noise-cancelling profiles, with each one optimized for something different. In fact, we'll let Senn do the explaining here:

"Mode 1 absorbs low-frequency noise in particular (100 to 400 Hertz), such as engine noise from trains, buses or small passenger planes. Mode 2 focuses on cancelling noise in the medium frequency range (400 to 3,000 Hertz), which is caused above all by air-conditioning systems in large passenger aircraft or office buildings. Mode 3 has a particularly wide frequency range (100 to 3,000 Hertz), and combines the noise-cancelling effect in the medium and low-frequency ranges. As a result, background noise with different noise components, such as that which occurs at airports, railway stations or underground stations, can be effectively suppressed, although with a slightly lower noise-cancelling performance than in the first two modes."

In case that's not enough to convince ya, these offer a frequency response of 20Hz to 21,000Hz, and they'll function just fine (albeit sans noise cancellation) even if your AAA battery keels over. Controls are embedded in the cabling, and users are able to activate the TalkThrough function if they'd prefer to conduct a conversation with someone without actually removing their earphones. Furthermore, changing between the NoiseGard profiles and activation of the TalkThrough function are indicated by both an acoustic and a visual signal. The company will be shipping these with a 4.5-foot long cable, an in-flight adapter, 6.35mm jack plug adapter, a small carrying case and a diaphragm protector, with sales to start later this month for around $320.