Canceling Headphones
How Do Noise Cancelling Headphones Work?
Noise cancelling headphones are useful to block out noise in noisy environments like trains, buses, and public places. The technical theory that is worked out is that this device copies the sound waves from outside and then they make these sound waves go out of phase. It can be also compared to that of swimming upstream. If a river's downstream current is directly proportionate to your upstream swimming strength, then you stay still. In this case, the device stays quiet!
There are two models of noise cancelling headphones. Over-the –head headphones are a little larger and less compact but the Earbud Headphones are compact and can be carried around in your pocket.
There are two types of headphones designed to reduce the interference of the noise that is created in the background. They are the passive Noise Canceling headphones and the active noise cancelling headphones. Passive noise cancelling headphones work on the theory of muffling the external noise or sound to lessen the interference with music or recorded speech. Active noise cancelling headphones on the other hand, electronically decrease the external sound and produce a quiet and calm listening environment.
Passive headphones essentially utilize the muffling characteristics that are provided by circum- aural headphones. It is designed like a cup with the rim surrounding the ear. The rim constitutes of high- density foam and sound dampening material. It is soft and doesn't hurt the ears and it creates an acoustic seal that has the capacity to block 20 decibels of noise.
Active noise cancelling headphones are a more advanced version and have the potential to reduce 20 decibels more noise reduction than the passive model. It uses the phase cancelling technology in its working. This is the main key feature of this model. It works by using a microphone to pick out the external noise which the circum- aural cushions are unable to prevent or block out. The frequency and the intensity of the external noise are analyzed by the phase canceling circuit and it generates a mirror image of the noise. The noise created is 180 degrees out of phase.
The speaker of the headphones plays the anti-noise along with the music or recorded speech. The artificially generated anti-noise is exactly the opposite of the external noise that has entered the device and so when the two noises meet they cancel out each other. The end result is that the volume of the external noise becomes extinct and the audio you are listening to becomes very clear and audible.
About the Author
Chris is the writer of this article , you can visit us for more information on how do noise cancelling headphones work and noise pollution.
ATH-ANC7B Quietpoint Active Noise Cancelling Headphones
 |
 Audio Technica ATH ANC7B Quitepoint Noise Canceling Headphones $116.95 Time Remaining: 6d 23h 14m Buy It Now for only: $116.95 Buy It Now |
 DENON Noise Canceling Stereo Headphones Model AH NC732 Store Demo VG++ $37.00 (12 Bids) Time Remaining: 1d 12h 49m |
 Used lightly Bose QuietComfort 2 QC2 Noise Canceling Headphones NO RESERVE $88.00 (18 Bids) Time Remaining: 1d 8h 2m |
 Audio Technica QuietPoint Noise Canceling Headphones $116.95 Time Remaining: 6d 23h 14m Buy It Now for only: $116.95 Buy It Now |
 Bose Quiet Comfort 2 Acoustic Noise Canceling Headphones $91.00 (5 Bids) Time Remaining: 13h 49m |
 Sony MDR NC7 MDRNC7 Noise Canceling Foldable Headphones With Leather Case $18.99 Time Remaining: 6d 7h 37m Buy It Now for only: $18.99 Buy It Now |
 Sony MDR NC500D Digital Noise Canceling Headphones $51.00 (2 Bids) Time Remaining: 1d 11h 39m |
 Rocketfish RF NCHP01 ATMOS Noise Canceling Over the Ear Headphones RF NCHP01 $11.61 (11 Bids) Time Remaining: 16h 12m |
 Sony MDR NC7 MDRNC7 Noise Canceling Foldable Headphones Black $19.25 Time Remaining: 24d 11h 54m Buy It Now for only: $19.25 Buy It Now |
 Bose Aviation X Headset Noise Canceling AHX 32 02 $91.00 (7 Bids) Time Remaining: 4d 16h 48m |
 Sony MDRNC200D MDR NC200D Digital Noise Canceling Headphones NEW $134.99 Time Remaining: 22d 8h 40m Buy It Now for only: $134.99 Buy It Now |
 Beats by Dr Dre Solo HD Monster Black w control talk headphones noise canceling $71.00 (27 Bids) Time Remaining: 1d 19h 36m |
 Bose QuietComfort 2 Acoustic Noise Canceling Headphones Quiet Comfort QC2 $152.50 (29 Bids) Time Remaining: 16h 4m |
 Audio Technica ATH ANC23 QuietPoint Active Noise Canceling Headphones ANC23 TOP $42.95 Time Remaining: 18d 23h 24m Buy It Now for only: $42.95 Buy It Now |
 Bose Aviation X Headset Noise Canceling with Soft Carry Case $256.00 (2 Bids) Time Remaining: 1d 10h 56m |
 Rocketfish RF NCHP01 Atmos Noise Canceling Over the Ear Headphones $17.99 Time Remaining: 5d 11h 49m Buy It Now for only: $17.99 Buy It Now |
 SONY MDR NC7 NOISE CANCELING FOLDING ON EAR HEADPHONES WITH AIRPLANE ADAPTER $9.99 Time Remaining: 18h 43m |
 new Able Planet NC180B Foldable Noise Canceling Headphones pouch plane adapter $41.79 Time Remaining: 21d 20h 39m Buy It Now for only: $41.79 Buy It Now |
 Bose Aviation X Headset Noise Canceling with Soft Carry Case $250.00 (1 Bid) Time Remaining: 1d 12h 39m |
 AblePlanet Extreme Foldable Active Noise Canceling Headphones XNC230R Red $39.99 Time Remaining: 6h 21m Buy It Now for only: $49.99 Buy It Now |
 Sony MDR NC7 White Noise Canceling Headphones Earphone MDRNC7 WHI Closed Back $36.95 Time Remaining: 3d 22h 19m Buy It Now for only: $36.95 Buy It Now |
 AblePlanet Extreme Foldable Active Noise Canceling Headphones XNC230P Pink $39.99 Time Remaining: 6h 22m Buy It Now for only: $49.99 Buy It Now |
 Sony MDR NC7 MDRNC7 Noise Canceling Foldable Headphones With Case $18.49 Time Remaining: 6d 7h 38m Buy It Now for only: $18.49 Buy It Now |
 AblePlanet Extreme Foldable Active Noise Canceling Headphones XNC230G Green $39.99 Time Remaining: 6h 24m Buy It Now for only: $49.99 Buy It Now |
 BOSE QC15 QUIETCOMFORT ACOUSTIC NOISE CANCELING HEADPHONES MINT CONDITION $237.50 (19 Bids) Time Remaining: 16h 12m |
 NEW AUDIO TECHNICA ATH ANC7B QuietPoint Active Noise Canceling Headphones $139.95 Time Remaining: 24d 22h 7m Buy It Now for only: $139.95 Buy It Now |
 Bose Aviation X Headset Noise Canceling with Soft Carry Case $250.00 (1 Bid) Time Remaining: 1d 12h 38m |
 Sony MDRNC200D MDR NC200D Digital Noise Canceling Headphones NEW $119.95 Time Remaining: 16d 6h 41m Buy It Now for only: $119.95 Buy It Now |
 Sony MDRNC200D MDR NC200D Digital Noise Canceling Headphones NEW $132.50 (19 Bids) Time Remaining: 13h 8m |
 Bose QuietComfort 3 QC3 Acoustic Noise Canceling On Ear Headphones EUC $79.00 (1 Bid) Time Remaining: 6d 16h 19m |
 AH NC800 DENON NOISE CANCELING HEADPHONES new sealed $232.40 Time Remaining: 15d 14h 40m Buy It Now for only: $232.40 Buy It Now |
 Able Planet NC1100B Noise Canceling Headphone LINX AUDIO Lifetime Warranty NEW $94.50 Time Remaining: 13h 26m Buy It Now for only: $105.50 Buy It Now |
 PHILLIPS ACTIVE NOISE CANCELING HEADPHONES $15.60 Time Remaining: 16d 17h Buy It Now for only: $15.60 Buy It Now |
 Sony Noise Canceling Headphones Model MDR NC40 $8.50 (4 Bids) Time Remaining: 1d 12h 32m |
 Audio Technica ATH ANC7B Quitepoint Noise Canceling Headphones $119.95 Time Remaining: 6d 18h 22m Buy It Now for only: $119.95 Buy It Now |
 ABLE PLANET NC200B True Fidelity Foldable Noise Canceling Headphones AS IS $0.99 Time Remaining: 12h 20m |
 Plantronics CS361N Noise Canceling Wireless Office Headset $5.76 (4 Bids) Time Remaining: 4d 10h 54m |
 AUDIO TECHNICA ATH ANC27 NOISE CANCELING HEADPHONES NEW $61.50 Time Remaining: 13d 9h Buy It Now for only: $61.50 Buy It Now |
 Sony MDR NC13 Noise Canceling Headphones Audio Earbuds $25.00 (1 Bid) Time Remaining: 1d 9h 59m |
 Sentry Noise Canceling Headphones HO500 New $18.99 Time Remaining: 11d 11h 58m Buy It Now for only: $18.99 Buy It Now |
 Bose QuietComfort 2 Acoustic Noise Canceling Headphones $46.00 (6 Bids) Time Remaining: 4d 9h 33m |
 Bose Quietcomfort 3 Acoustic Noise Canceling Headphones $150.00 Time Remaining: 16h 2m Buy It Now for only: $200.00 Buy It Now |
 NEW Philips SHN2500 Noise Canceling Earbuds headphones $13.99 Time Remaining: 2d 10h 14m Buy It Now for only: $13.99 Buy It Now |
 Panasonic RP HC70 Noise Canceling Headphones $35.00 Time Remaining: 15h 38m Buy It Now for only: $50.00 Buy It Now |
 Rocketfish Atmos Noise Canceling Over the Ear Headphones RF NCHP01 Free Ship $29.99 Time Remaining: 27d 12h 17m Buy It Now for only: $29.99 Buy It Now |
 Panasonic RP HC70 Noise Canceling Headphones $35.00 Time Remaining: 15h 38m Buy It Now for only: $50.00 Buy It Now |
 NEW BOSE QC3 ACOUSTIC QUIETCOMFORT NOISE CANCELING HEADPHONES WITH WARRANTY $0.01 Time Remaining: 6d 16h 41m |
 NEW PHILLIPS SHN5500 NOISE CANCELING HEADPHONES $18.00 Time Remaining: 6d 13h 54m Buy It Now for only: $18.00 Buy It Now |
 BOSE QUIET COMFORT 2 NOISE CANCELING HEADPHONES CASE Excellent gently used con $9.99 (1 Bid) Time Remaining: 2d 19h 43m |
 New Vibe VS 750 DJ Noise Reduction DJ Style Headphones Canceling Foam $9.89 Time Remaining: 28d 13h 51m Buy It Now for only: $9.89 Buy It Now |
 Beats Studio by Dr Dre Hi Def Noise Canceling Over Ear Headphones READ THE AD $85.00 Time Remaining: 2d 4h 57m |
 Philips HN 110 Folding Noise-Canceling Headphones List Price: Sale Price: $39.99 You save: $47.72 (54%)  Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionTake the foldable HN110 headphone with you on your travels and enjoy great music everywhere--even in noisy environments like buses, trains and airplanes. It's a full-size headphone that covers your whole ear, yet it folds up for compact storage in the soft pouch supplied...  |
 Peltor H10A Optime 105 Over-the-Head Earmuff List Price: Sale Price: $18.83 You save: $15.11 (45%) Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product |
 Plantronics CS361N Binaural SupraPlus Wireless Professional Headset System, Noise-Canceling (70520-06) List Price: Sale Price: $195.14 You save: $206.28 (51%) Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionThe SupraPlus Wireless Professional Headset System was designed specifically for contact center supervisors and office professionals with phone-intensive responsibilities who demand hands-free mobility along with Plantronics supreme comfort and superior audio quality... |
 Sennheiser PC 151 Binaural Headset with Noise-Canceling Microphone & Volume Control List Price: Sale Price: $53.61 You save: $26.34 (33%) Eligible for free shipping!Availability: Usually ships in 1-2 business days See Reviews For This Product DescriptionMost popular Gamer headset for the ULTIMATE GAMER! Headphone is extremely comfortable and noise cancelling microphone keeps unwanted noise from masking your voice. High power stereo headphone with full size ear cushions for extended playing time. |
 Plantronics M214C Headset with Adjustable Volume List Price: Sale Price: $11.49 You save: $4.50 (28%) Eligible for free shipping!Availability: Usually ships in 1-2 business days See Reviews For This Product DescriptionMulti-task at home while enjoying clear, noise-free conversations with your hands-free Plantronics M214C headset for cordless phones. |
 Beats Studio by Dr. Dre - Hi-Def Noise-Canceling Over-Ear Headphones List Price: Sale Price: $299.00 You save: $50.99 (15%) Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionExperience music the way the artist wants you to. Beats high definition headphones are precision engineered to reveal the full sound of today's digital music including the most sonically demanding rock, hip hop and R&B... |
 JVC HANC250 High-Grade Noise-Cancelling Headphones Sale Price: $106.80 Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionThe new JVC HA-NC250 combines outstanding sound quality with advanced noise-canceling and isolation technologies, for a superior, uninterrupted listening experience. Outstanding sound quality with advanced noise-canceling and isolation technologies... |
 AO Safety 90541 WorkTunes AM/FM Hearing Protector with Digital Tuning and MP3 Input List Price: Sale Price: $48.47 You save: $31.52 (39%) Eligible for free shipping!Availability: Usually ships in 24 hours See Reviews For This Product DescriptionProtect your ears while keeping yourself motivated at your job site with your favorite tunes or radio programming with the AO Safety 90541 WorkTunes with digital tuning hearing protector, which includes an integrated AM/FM radio and a stereo input jack for connecting an MP3 player... |
 Ableplanet Noise Canceling Headphones Sale Price: $299.99 Eligible for free shipping!Availability: Usually ships in 2-3 business days See Reviews For This Product DescriptionAble Planet combines active noise cancellation with style. comfort and sound quality to create a full, rich sound anywhere you use them. Thanks to the soft ear cushions and lightweight design you'll enjoy superior comfort for hours of listening pleasure... |
![AmazonBasics High-Speed HDMI Cable (6.5 Feet/2.0 Meters)[Supports 3D + Audio Return Channel][OLD MODEL]](http://www.verticalmusictv.com/media/images/i/41HvrDRBhDL._SL75_.jpg)
![AmazonBasics High-Speed HDMI Cable (9.8 Feet/3.0 Meters) [Supports 3D + Audio Return Channel]](http://www.verticalmusictv.com/media/images/i/41nAsytjSsL._SL75_.jpg)
![AmazonBasics High Speed HDMI Cable (6.5 Feet / 2.0 Meters) - Supports Ethernet, 3D, and Audio Return [NEW MODEL]](http://www.verticalmusictv.com/media/images/i/417qWBWXqYL._SL75_.jpg)