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Noise cancelling headphones are very useful when you want to focus or just listen to your music without outside noise distracting you. Active noise cancelling headphones usually require power for an in-built microphone to listen to ambient noise and cancel it out, whereas passive noise cancelling headphones are basically giant earplugs for our ears. Read more by clicking here.

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 pilots, who have to rely on good sound quality and efficient protection against 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 filtered 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.
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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 pilots, who have to rely on good sound quality and efficient protection against 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 filtered 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.
Separate the noise from the music. Leave the noise behind, and get the most from your music. QuietComfort 3 headphones offer a proven combination of Bose® noise reduction and audio performance with a comfortable on-ear fit. These award-winning headphones deliver clear, lifelike sound, making listening a pleasure just about anywhere. Proven performance QC3 headphones feature Bose® Acoustic Noise Cancelling® technology to electronically identify, then dramatically reduce, the noise around you. You're left with the music you love—or the simple serenity you desire. Proprietary signal processing and audio reproduction technology also provide lifelike performance across the full range of sound—including deep low tones—from small and lightweight headphones. Create a comfortable escape Think of your noisy office, or the bustling activity in train stations and other public places. At the flip of a switch, that background noise is reduced to a whisper. That’s when the high quality sound these headphones provide becomes even more apparent. You’ll hear more of your music—without having to turn up your music. And the soft-cushioned, easy-on-the-ears fit lets you listen comfortably for hours. Hear the difference for yourself Wear Qc®3 headphones when you fly, and you'll notice a dramatic reduction in engine noise the moment you turn them on. And when it's time for some music, simply plug the cable into your portable player, tablet or the inflight entertainment system. The cable fits directly into most any portable device. QC3 headphones come with an additional cable customized for select Apple® products. A three-button remote and inline microphone let you take calls on your iPhone and manage music on other Apple devices. You can control volume, track selection and voice applications, plus easily switch between calls and music. You can also purchase a mobile kit that lets your QC headphones work with other cell phones, too.
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Separate the noise from the music. Leave the noise behind, and get the most from your music. QuietComfort 3 headphones offer a proven combination of Bose® noise reduction and audio performance with a comfortable on-ear fit. These award-winning headphones deliver clear, lifelike sound, making listening a pleasure just about anywhere. Proven performance QC3 headphones feature Bose® Acoustic Noise Cancelling® technology to electronically identify, then dramatically reduce, the noise around you. You're left with the music you love—or the simple serenity you desire. Proprietary signal processing and audio reproduction technology also provide lifelike performance across the full range of sound—including deep low tones—from small and lightweight headphones. Create a comfortable escape Think of your noisy office, or the bustling activity in train stations and other public places. At the flip of a switch, that background noise is reduced to a whisper. That’s when the high quality sound these headphones provide becomes even more apparent. You’ll hear more of your music—without having to turn up your music. And the soft-cushioned, easy-on-the-ears fit lets you listen comfortably for hours. Hear the difference for yourself Wear Qc®3 headphones when you fly, and you'll notice a dramatic reduction in engine noise the moment you turn them on. And when it's time for some music, simply plug the cable into your portable player, tablet or the inflight entertainment system. The cable fits directly into most any portable device. QC3 headphones come with an additional cable customized for select Apple® products. A three-button remote and inline microphone let you take calls on your iPhone and manage music on other Apple devices. You can control volume, track selection and voice applications, plus easily switch between calls and music. You can also purchase a mobile kit that lets your QC headphones work with other cell phones, too.
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AKG N60Nc On-Ear Headphone w/ Microphone at 2055.00 HKD from TREOO.com
AKG N60Nc On-Ear Headphone w/ Microphone
HK$ 2,055.00
TREOO.com
Get in tune with your music while shutting out the world Hear no evil. The AKG N60Nc headphones deliver Grammy award-winning AKG superior sound while also utilizing best in class active noise cancelling to minimize the disruptive sounds encountered on everything from planes to trains. This newest member of the Flight line-up will rock your world continuously with up to 30 hours of battery life. And if immersing yourself in your music for a long period of time is the goal, the N60Nc can still be used in passive mode after the battery dies out. Accented with premium material such as aluminum, memory foam and leather, this unparalleled listening experience comes magnificently packaged in elegantly crafted lightweight headphones that provide both viewing and listening pleasure. In addition, this ultra premium audio offering comes complete with first-class features like an exclusive 3D-Axis folding mechanism, a fully-accessorized travel package, a one button universal remote/mic cable and a USB charging cable. AKG reference sound The ultimate, uncompromised sound quality. Active noise-cancelling High performance, active noise-cancelling technology. Smartphone-compatible Equipped with universal remote to instantly connect your headphones to most smartphones. A clear, word-class acoustic signature with a warm bass response that will take your musical enjoyment and appreciation to new levels. Designed for convenient transport and storage thanks to the 3D folding mechanism and the carrying case, you can get up and go with your music at the drop of a high hat. Thanks to the 30 hours battery life and the convenient USB charging cable, the N60Nc can be enjoyed all the way (and back). Reduces ambient noise especially when travelling to create a perfect sound environment where you can be alone with your music and yourself.
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Get in tune with your music while shutting out the world Hear no evil. The AKG N60Nc headphones deliver Grammy award-winning AKG superior sound while also utilizing best in class active noise cancelling to minimize the disruptive sounds encountered on everything from planes to trains. This newest member of the Flight line-up will rock your world continuously with up to 30 hours of battery life. And if immersing yourself in your music for a long period of time is the goal, the N60Nc can still be used in passive mode after the battery dies out. Accented with premium material such as aluminum, memory foam and leather, this unparalleled listening experience comes magnificently packaged in elegantly crafted lightweight headphones that provide both viewing and listening pleasure. In addition, this ultra premium audio offering comes complete with first-class features like an exclusive 3D-Axis folding mechanism, a fully-accessorized travel package, a one button universal remote/mic cable and a USB charging cable. AKG reference sound The ultimate, uncompromised sound quality. Active noise-cancelling High performance, active noise-cancelling technology. Smartphone-compatible Equipped with universal remote to instantly connect your headphones to most smartphones. A clear, word-class acoustic signature with a warm bass response that will take your musical enjoyment and appreciation to new levels. Designed for convenient transport and storage thanks to the 3D folding mechanism and the carrying case, you can get up and go with your music at the drop of a high hat. Thanks to the 30 hours battery life and the convenient USB charging cable, the N60Nc can be enjoyed all the way (and back). Reduces ambient noise especially when travelling to create a perfect sound environment where you can be alone with your music and yourself.
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Bose QuietComfort 25 Noise-Cancelling Over-the-Ear Headphone with Mic (for iPhone/iPod) - White at 2946.00 HKD from TREOO.com
Bose QuietComfort 25 Noise-Cancelling Over-the-Ear Headphone with Mic (for iPhone/iPod) - White
HK$ 2,946.00
TREOO.com
QuietComfort® 25 headphones are re-engineered to sound better, be more comfortable and easier to take with you. Put them on, and suddenly everything changes. Your music is deep, powerful and balanced, and so quiet that every note sounds clearer. Even air travel becomes enjoyable, as engine roar gently fades away. No matter how noisy the world is, it's just you and your music—or simply peace and quiet.
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QuietComfort® 25 headphones are re-engineered to sound better, be more comfortable and easier to take with you. Put them on, and suddenly everything changes. Your music is deep, powerful and balanced, and so quiet that every note sounds clearer. Even air travel becomes enjoyable, as engine roar gently fades away. No matter how noisy the world is, it's just you and your music—or simply peace and quiet.
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Bose QuietComfort 25 Noise-Cancelling Over-the-Ear Headphone with Mic - Black at 2946.00 HKD from TREOO.com
Bose QuietComfort 25 Noise-Cancelling Over-the-Ear Headphone with Mic - Black
HK$ 2,946.00
TREOO.com
QuietComfort® 25 headphones are re-engineered to sound better, be more comfortable and easier to take with you. Put them on, and suddenly everything changes. Your music is deep, powerful and balanced, and so quiet that every note sounds clearer. Even air travel becomes enjoyable, as engine roar gently fades away. No matter how noisy the world is, it's just you and your music—or simply peace and quiet.
Read more
QuietComfort® 25 headphones are re-engineered to sound better, be more comfortable and easier to take with you. Put them on, and suddenly everything changes. Your music is deep, powerful and balanced, and so quiet that every note sounds clearer. Even air travel becomes enjoyable, as engine roar gently fades away. No matter how noisy the world is, it's just you and your music—or simply peace and quiet.

Noise-Cancelling Headphones

What are noise cancelling headphones?

In very simple terms, noise cancelling headphones basically cancel noise – specifically ambient sounds that are outside of the headphone.

Noise cancelling headphones are useful in many different situations, and it also allows the user to listen to music without increasing the volume a lot, which protects the users hearing in the long run. However, noise cancelling headphones are not just for people who want to listen to music, it can also be used to block out sound so that the user can sleep or focus in peace.

Noise cancelling headphones also play a vital role in the field of aviation where the headphone can block out the ambient sounds so that pilots of officers can focus and pay attention to incoming announcements and audio information easier. Noise cancellation headphones are good for:

  • Blocking out ambient sounds or noise
  • Enables the user to focus or to rest better
  • Does not require the user to increase their volume a lot to listen to audio, which protects against hearing loss in the long term

Active and Passive noise cancelling headphones

There are two types of noise cancelling headphones, Active and Passive. They both do the very same thing, but in different manners – and a person may choose from one or the other based on their differences and their pros and cons.

Active noise cancelling headphones

Active noise cancelling headphones typically have a microphone of sorts that is built into the headphone which measures sound or noise outside of the headphone environment, then uses that data to generate a waveform which is the exact negative of the ambient sound. This cancels out the incoming sound.

Active noise cancelling headphones usually cost more than normal headphones, which are usually passive headphones. A built in battery is also usually required as the active noise cancellation requires power, so a USB port or removable battery pack is usually present – which could make the headphone be rather heavy as well.

Passive noise cancelling headphones

Passive noise cancelling headphones generally have no extra electronic parts or components inside of them that are not the core parts for producing audio. Passive noise cancelling headphones block out ambient sound via soundproofing or sound insulation.

This happens because of the seal the headphones make when it sits on the top of our heads and rests on our ears. It basically makes the headphone as a sort of large earplug to seal our ears from outside ambient sound and noise. Closed back headphones with ear cups that completely cover the ears provide much better passive noise cancellation than those which sit on your ears.

However, for those who want more affordable and simpler noise cancellation can opt for in-ear earphones, which have ear tips that fit into the ear canal to provide a proper and complete seal for noise cancellation. These fitting ear buds firm an almost perfect seal and provide very good noise cancellation.

If you want a suitable audio solution to cancel ambient noise and sound, do consider the pros and cons of choosing either between an active noise cancelling headphone or a passive noise cancelling headphone – active noise cancelling tend to be more expensive, but they do have the advantage of both the passive and active noise cancelling headphones at the same time.

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