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If you’ve ever tried listening to music on a flight, you’ll be familiar with battling the constant droning of the jet engines. Active noise-cancelling headphones also use special materials, but go one step further and create their own sound waves too. These anti-sound waves are then played back from a small speaker in the ear cup, actively blocking the ambient sound waves through a phenomenon known as destructive interference.
Unfortunately for music lovers, many types of ambient sounds can interfere with or even block the sounds coming through their headphones.
Active noise-canceling headphones can do everything that passive ones can do -- their very structure creates a barrier that blocks high-frequency sound waves.
Using these components, noise-canceling headphones are able to provide an additional reduction in noise of 20 decibels. While noise-canceling headphones do a good job distinguishing between the audio a wearer wants to hear and the background noise he or she wants to keep out, some people say that they compromise sound quality by muffling sounds. For lots more information on noise-canceling headphones and related topics, check out the links on the next page.
On long plane rides there is always going to be that crying baby and unfortunately under Murphy’s Law, it will very likely be crying somewhere in a seat near you. The Panasonic RP-HC55-S Noise-Cancelling Earbud Headphones is an active noise-canceller that fits in the ear. Panasonic thought of what you would want in an in-ear headphone set when they created their product. Though over the ear headphones can’t be beat for their quality in sound, the Panasonic in-ear technology includes neodymium magnets and a 9mm drive to provide a decent sound quality to enjoy your music.
Nothing is more annoying than buying a set of ear-buds that you later find don’t fit in your ear.
The aircraft adaptor is designed for those long rides when you are at the mercy of your neighbors’ sound level. Overall, most customers were satisfied with the Panasonic RP-HC55-S ear-buds and felt that they lived up to or exceeded their expectations.
Some customer reviews noted that the noise-cancelling unit is heavy enough that it sometimes pulls the ear-buds out of your ear. The other complaint with this device was that the AAA battery is constantly running even if you are just using the ear-buds for music and don’t need to run the noise cancelling device.
Brand New HeadphonesAn extensive list of brand new headphones on the market today with varied features, sound output, design changes and many more! Noise-cancelling headphones can reduce this ambient sound, helping you to enjoy listening to music or watching an in-flight movie. Tucked inside the earpiece is a small microphone that detects ambient sound and feeds it to a digital processor, which analyses the sound wave’s composition.
When the incoming sound wave is at a peak, the anti-sound wave is at a trough, and the sum of these two waves adds to zero, resulting in minimal external sound reaching the wearer’s ears.


If you have a tablet or smartphone, you can also download the digital version onto your iOS or Android device.
If you have ever tried to listen to a CD or MP3 player on a plane, then you know the problem well: The roar of the engines makes it difficult to hear what's being piped through the speakers -- even when those speakers are situated in or on your ear.
They also add an extra level of noise reduction by actively erasing lower-frequency sound waves. Notice that the two waves -- the one coming from the noise-canceling headphone and the one associated with the ambient noise -- have the same amplitude and frequency, but their crests and troughs (compressions and rarefactions) are arranged so that the crests (compressions) of one wave line up with the troughs (rarefactions) of the other wave and vice versa.
That means about 70 percent of ambient noise is effectively blocked, making noise-canceling headphones ideal for airline and train travel, open office environments or any other location with a high level of background noise.
Users can also experience a change in air pressure, although ports built into the ear cup are meant to vent air trapped behind the speakers. The dB scale is logarithmic, meaning that a change of 10 dB represents a tenfold change in loudness.
There are passive or active noise-cancellers; over the ear head-phone sets or in-ear headphones depending on your preference. These in-ear headphones are designed to cut down on 88% of the ambient noise and allow you to relax in your own world of peace, quiet, and music.
Some of the Panasonic RP-HC55-S Noise-Cancelling Earbud Headphones features besides the noise-cancelling aspect are listed below.
With the RP-HC55 you have the option to either listen to your favorite song or drown out the background noise to create your own silence. The RP-HC55 is one of the best smallest designed noise-cancelling ear buds and are designed to fit very nicely in the ear. The clothing clip is designed to counter-balance some of the weight that automatically comes with the technology of noise-cancellers. This adaptor allows you to travel secure in the knowledge that you can relax in a peace and quiet that your fellow-travelers won’t be able to disturb.
The noise-cancelling was effective in noisy environments, and it was a good quality for a relatively inexpensive price-tag. The placement of the unit is in the middle of the cord ruling out the ability to put it in your pocket, which is a bit of a nuisance.
The noise-cancelling aspect is a great concept; and to get peace and quiet on a long ride these ear-buds are definitely a beneficial side-kick.
It uses this information to create a sound wave that’s the complete opposite of the one it analysed. To make sure you never miss an issue of How It Works magazine, make sure you subscribe today!
That's because the materials of the headphones themselves block out some sound waves, especially those at higher frequencies. In essence, the two waves cancel each other out, a phenomenon known as destructive interference.


They also help alleviate fatigue when traveling, which can result from exposure to low-frequency noise for an extended period of time. They change sound waves into electrical signals, while speakers change electrical signals into sound waves.
An active noise canceller is created to block sound waves and also create white noise, whereas passive cancellers just rely on a suction sound-proof fit.
Although you may sacrifice a little in sound quality by choosing an in-ear device as opposed to an over the ear set, the in-ear headphones are travel-size for when you are on the go and cut down on lugging around unnecessary bulk.
Also, the removable, replaceable ear buds are offered in 3 different sizes to make sure the fit is right for you.
With this clip you can attach the 2.5 ft cord to your shirt pocket so the cord won’t be slinging around and pulling at your ears. It is necessary to clip it to your shirt to off-set the weight of the noise-cancelling unit.
The latter is the simplest method, as it blocks sound waves with layers of high-density foam. This ‘anti-sound’ wave has the same sized peaks and troughs as the background noise, but they are inverted. The best passive noise-canceling headphones, however, are circum-aural types that are specially constructed to maximize noise-filtering properties.
They actually create their own sound waves that mimic the incoming noise in every respect except one: the headphone's sound waves are 180 degrees out of phase with the intruding waves.
You can even use noise-canceling headphones if you don't want to listen to another audio source but do want to cancel out background noise. All in all the Panasonic RP-HC55-S is a decent set of ear-buds that is ready to travel wherever you go and delete excess noise from your life.
This is good for masking high frequency sounds such as a loud bang, but the headphones will struggle to stop resonances at a lower frequency. That means they are packed with layers of high-density foam or other sound-absorbing material, which makes them heavier than normal headphones. The tradeoff of all that extra weight is a reduction in noise of about 15 to 20 decibels (dB). But considering jet engines create 75 to 80 dB of noise inside the aircraft cabin, passive models have some serious limitations.



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