Have you been on a plane using your headphones, and found yourself not able to enjoy that movie you had been watching because there was a lot of noise from the engine, your snoring seatmate, or other noise producing factors around you that you could still hear? Have you found yourself wishing you could enjoy that train ride better, if perhaps you could enjoy your own personal in-ear entertainment but rather disappointed because you got that unwanted train mechanism hitting the rail tracks? Don’t you wish there was a way to cancel out those unwanted sounds from the surrounding and isolate what you want to hear from your headphones in the purest timbre?

They were exactly the same wishes which Lawrence J. Fogel and Dr. Amar Bose had in mind when they began developing earphones that may isolate unwanted ambient noise. They both individually tried to study and develop methods to produce something which could answer their dissatisfaction to noise caused the airplane’s engine while riding an airplane. After a decade of researching and development, the very first noise cancelling headphones were released by Bose.

Noise-cancelling headphones were created to minimize those unwanted noises around one’s environment.They help isolate the produced sound by producing reverse polar sound waves like those which are coming from the external surroundings. This is made possible by Active Noise Control or simply referred to as ANC.

ANC basically works though a microphone, placed close to the ear, which serves as the sensor. If this picks up those external sounds, its electric circuitry produces sound waves that are reverse in polarity. Serving as anti-noise sound waves, the sound picked up externally is cancelled and minimized to the listener wearing the noise-canceling headphones. The end result is pure sound quality at whatever volume is selected.

Currently available on the market, you should typically find Noise Canceling headphones that have ANC for mostly low frequency noise. This is because lower frequency sound waves sound multi-directional rather than sounding from a singular source, making it easier for the ear to pick up. They would also contain longer wave lengths which will make it tougher to block.

For sounds that have higher frequencies and are shorter in wave lengths, companies would usually rely on their other noise minimization techniques, for example ear cups design and materials, to block them. Because they have shorter wave lengths, they can be easier to block and cancel out.

With the idea of frequency and wave sound length having an inverse relationship, companies have opted to produce noise-canceling headphones with an ANC for lower frequencies only because it would entail having a much more simple electronic circuitry. Other techniques anyway would be sufficient to make the noise-blocking effect that one would wish in a noise-canceling headphone.

Noise-canceling headphones are already gaining their popularity all over the world. Not only do they have entertainment benefits, but ear-drum maintenance too. As a user wouldn’t need to raise the volume to hear only what he or she is listening to, less stress is put on the ear drum. Speak about a double benefit!

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