What is Noise Cancelling? (& Why Your Next Headphones Should Have It)

by birtanpublished on September 2, 2020

Noise canceling is one of the big differentiators of the new Apple earpods Pro over the standard air pods and it's a big selling point on some of the most popular headphones for travel on Amazon period headphones like the air pods Pro the ever-popular Sony MX 1,000 Mark

Threes the bose QC three 5s and the newer bose 700 s are the ones you'll generally see people using around town and especially on flights at least a part of the reason for this especially on flights is the fact that they all

Have active noise cancelling or ANC for short but what is noise cancelling how does it work and why is it a good feature to have in your next pair of headphones well in this week's episode of decoder where I try to explain a

Piece of tech once a week let's try to answer all of those questions and more now firstly there are two types of noise canceling that we need to talk about there's passive noise canceling and

Active noise canceling passive noise cancellation is really just the act of soundproofing something basically so in headphones this pertains to things like the designing of the earbud to fit snugly enough into the ear canal as to

Block sound from the outside world the over ear cup cushion being made from a material that allows your ears to breathe and it's comfortable but can still also block outside noise from entering etc this type of noise

Cancelling sometimes called noise isolation does help with removing noise from around you and also doesn't require any power to function but the much more interesting noise cancelling and the one that needs a bit more explaining frankly

Is the active noise canceling variety and it's kind of clever how it works active noise canceling like that found in headphones that I just mentioned actually using a microphone on the outside of the headphones to measure the

Ambient sound around you and take note of the sounds amplitude and frequency to rate a finger print of sorts for the sounds waveform then the processor and software in the headphones creates a waveform of its own that has the exact

Same amplitude and frequency but changes the phase 180 degrees so having the exact opposite looking waveform Peaks where the original noise had valleys valleys where the peaks were etc this then essentially creates silence for

Those sounds this works because of a phenomenon in sound waves which is also in light waves but we'll save that for another video maybe that when tuned sound waves interact with one another they create interference with each other

And the individual waves add together to create a new wave form with the sum of both being the new amplitude so thanks to a concept called destructive interference if the peak of one wave is the exact opposite of the valley of the

Other wave they combine and negate each other giving us an amplitude of zero aka silence now regardless of the theory you can get very different qualities of the noise cancellation based on a number of factors including the ambient noise

Itself the algorithm the company is using to do the cancellation the speaker's etc etc so just keep in mind that not all noise cancellation is created equally and it's best to try it out first on the headphones that you

Ultimately decide to purchase if you can oh guys a unusually quick episode of decoder this week but hope you guys enjoyed that hope you guys are enjoying the new series you can check out the rest of it at the link here let me know

The comments below what you guys think of this series always appreciate hame from you guys and if you like this video please thumbs up it or share it greatly appreciate it and share the rest of channel if you like what you see

There please subscribe it ding the bell nice or subscribe so you get notified when I do new videos as always though regardless thanks for watching and I'll see you next week

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