Sennheiser launches new noise-cancelling headphones designed to accompany your iPod

Headphone guru Sennheiser has just launched a new, iPod-friendly gloss-white version of its renowned PXC 250 headphones.

Costing around £100, the foldable white PXC 250Ws also offers Sennheiser’s NoiseGard noise reduction system, used by BA & Lufthansa Pilots for cutting out the effects of external sound during headphone use.

Key features of the PCX 250W:
* compact fold-flat design
* weigh just 65gms
* advanced NoiseGard active electronic noise reduction
* new closed design for extra noise reduction, giving around a 70% reduction in ambient noise overall
* dynamic, clear sound
* reduce risk of hearing damage
* work with iPods, portable CD, airline systems and more

The NoiseGard effect
* Continuous engine / motion noise is dramatically reduced
* Vocal and musical intelligibility is increased
* All listening can be carried out at lower levels, reducing the real risk of hearing damage from listening at high volumes,
* Stress is reduced due to the reduction in overall noise levels.
* Vital warning & emergency signals remain clearly audible (unlike ear defenders or earplug phones)

NoiseGard works like this: A tiny microphone inside each earpiece 'listens' to ambient noise. This noise is then reversed in phase and fed back into the earpieces. The out of phase ‘anti-noise’ cancels the real noise, leaving the desired signal. Sennheiser claims that continuous noise between 400 and 1000 Hz is reduced by approx -10dB.