This Earphone

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Product description from Walmart.com:

Eliminate unwanted external noise and enjoy your music in peace with the Philips Noise-Canceling Neckband Headphones. They actively cancel background noise by up to 75%, and are ideal for use in airplanes and trains.

• Soft ear cushions
• 3-way adjustment for personalized fit
• Flexible rubber earhooks deliver a comfortable and secure fit
• Slim, lightweight controls for power and volume adjustments
• Ideal for outdoor use
• Single-sided 1.2 m cable reduces tangling and improves comfort
• Adapter for in-flight entertainment system connection
• 3.5 - 6.35mm adaptor connects to all types of audio devices
• Battery included

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Product description from Buy.com:

Ideal for the traveler, student or music lover. The latest technology at an affordable price and convenient size. The NC300B features an adjustable headband, superior sound quality and clarity, patented LINX AUDIO technology, removable in-line volume control for easy adjustment to safe listening levels (no more hunting for the volume control) and state-of-the-art active noise cancelation (ANC). With over 20 International CES and CTIA awards, the sound quality will delight even the most discernable ear.

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Today’s Rank: 20
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Product description from B&H Photo Video:

Sennheiser PXC450 High end travel headphone

Sennheiser PXC450 High end travel headphone
The PXC 450 is a circumaural high-end travel headphone set with NoiseGard? 2.0 technology and TalkThrough function for the best possible attenuation of ambient noise.

The PXC 450 enables an unprecedented sound experience for people on the move, thanks to its adaptive baffle damping in combination with the patented Duofol diaphragms, which prevent unwanted partial oscillation and thus guarantee a highly natural, lifelike sound quality.

NoiseGard? is an active noise compensation system which Sennheiser originally developed for use by pilot
s, who have to rely on good sound quality and efficient prot!
ection a
gainst ambient noise even in high-noise environments. NoiseGard? actively compensates the noise, based on the physics principle of sound and counter-sound.

NoiseGard? 2.0 has perfected the NoiseGard? principle thanks to the use of optimised circuitry design and even more efficient processors. It also uses better quality microphones, which enable more sophisticated pick-up of unwanted noise. Specially developed filter algorithms enable improved active noise compensation of up to 90% (23 dB). It is of course also possible to use these headphones passively, i.e. without NoiseGard? and without batteries.

Users of a PXC 450 who wish to communicate with their neighbours can do so without taking off the headphones: when the TalkThrough function is activated, professional quality microphones mounted on the outside of the headphones pick up all acoustic signals in the immediate vicinity. Unwanted background noise, such as the sound of the engines on a plane, is filte
red out electronically to a great extent, so that only the neighbour?s voice is passed on through the headphones into the user?s ear in top audio quality.

The PXC 450 is foldable and is supplied complete with practical transport case, 2 AAA batteries and audio adaptors (double mono and 6.3mm). Volume control integrated in the headphones and a single-sided detachable and replaceable cable ensure maximum convenience for the user.

Features
* Audiophile sound experience on the move: outstanding sound quality thanks to adaptive baffle damping and patented Duofol diaphragm technology
* NoiseGard? 2.0 active noise compensation provides best possible protection against ambient noise (up to 90.0%)
* Comfortable fit and high level of passive ambient noise attenuation thanks to circumaural ear pads and padded headband made of top quality materials
* TalkThrough function: for easy communication with the people around you while wearing the headphones

* Volume can be adjusted directly on the headphones
* I!
deal for
people on the move: comfortable, sturdy and foldable headphone design
* Audio transmission always works ? even in passive mode and without the batteries
* Ideal for use with in-flight entertainment systems, MP3 players and all other portable and stationary audio equipment
* Top quality materials and replaceable ear pads and cable for long service life
* Comes with full accessories: transport case, 2 audio adaptors (in-flight entertainment and 6.3 mm), batteries
* 2-year warranty
Specification
*Transducer principle: dynamic, closed
*Ear copupling: circumaural
*Frequency response: 8 ? 28,000 Hz
*Nominal impedance: 150/750
*SPL: 108 dB SPL at 1 kHz, 1 Veff
*THD: 0.1 %
*Connection cable: 1,4 m
*NoiseGard? noise compensation: up to 23 dB
*Passive noise attenuation: up to 32 dB
*Audio connector: 3.5 mm stereo jack plug with 6.3 mm stereo adaptor and double-mono airplane adaptor
*Weight (without cable): 240 g
D
elivery Includes
* PXC 450 high-end travel headphone
* Transport Case
* 2 Audio Adapter (In-flight-Entertainment and 6,3 mm)
* 2 AAA batteries

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