How Do Noise Cancelling Headphones Work Physics? – Overview
Most of us do wear a pair of headphones to keep distant from the outer world. Yes, we use to wear headphones to cut out ourselves from the outer world.
No matter whether we are traveling, have to wait for the flight, or any other reason, a pair of headphones is the best companion for all of us.
Have you ever wondered how do noise-canceling headphones work physics? If not, then this article is for you.
Before we jump on to the actual details of knowing the physics of the sound from the noise-canceling headphones, let us take a look at the list of its advantages first.
This will clear up your doubts about why most people prefer to buy noise-canceling headphones over other types.
Why you should buy noise canceling headphones?
Noise canceling headphones are completely different from normal headphones that we use in daily life.
Noise Canceling headphones work on a different physics that eliminates the sound from the environment so that you can have the best music experience.
If you are a true music lover and don’t want any external disturbance, then you must buy a pair of reliable noise canceling headphones.
A good noise canceling headphones is the best companion for the frequent traveler, a fitness enthusiast, and a true music lover who spends hours of his time listening to music and different tracks.
Noise Canceling Technology
Noise Canceling headphones are designed with the latest noise-canceling technology. With the help of this technology, you can hear only the music and nothing else.
The headphones isolate the environmental noise. Noise reduction technology helps to ease the manufacturing process of this special type of headphones for music freaks.
Unlike ordinary headphones, you can have the best of feeling to enjoy your music. You can listen to every single bit of your favorite music to spend gold time.
You have to keep in mind that noise canceling headphones are a bit pricier than ordinary headphones but it’s all worth it.
Physics of Noise Cancelling Headphones
Noise Cancelling headphones can be categorized into two different types i.e. Active Noise Cancellation and Passive Noise Cancellation.
The headphones are categorized with the base of the technology used to manufacture them.
What is Active Noise Canceling Headphones?
Active Noise Canceling headphones use an external microphone that will capture the sound coming from your music player or mobile phone.
Each earcup of the headphone features a built-in microphone that detects the sound from the environment and creates active waves.
The built-in technology also creates similar waves to reduce the environmental waves. Both the waves cancel each other resulting in complete silence.
Active Noise Cancelling headphones are highly recommended for true music lovers or professional users who don’t want any kind of sound.
These types of headphones are designed with special technology and materials that make them a bit pricier.
You have to pay a few extra bucks to buy a new pair of active noise canceling headphones.
What is Passive Noise Canceling Headphones?
Passive Noise Canceling Headphones are relatively cheaper than active noise canceling headphones.
They work on a simple principle of isolating the external noise by using the insulating materials.
Yes, the active noise canceling headphones are designed with noise-insulating materials to reduce the noise from the outer world when you wear them.
Passive Noise Canceling headphones are a good choice for those who are not searching for professional-grade headphones.
Most of us love to enjoy music and not use them for any other purpose. For those, a pair of passive noise canceling headphones is recommended.
They come in a budget price tag and also give you the best music experience.
How Do the Headphones Cancel Noise from the Outside?
The physics behind the active noise canceling headphones are called anti-phase. As noted above, the physics of the noise canceling headphones work on waves.
The active noise cancelation technology aims to reduce the external waves by producing the anti-waves which is why the trick is known as anti-phase.
Depending upon the sound quality, the lengths of the waves may vary. Thankfully, the technology itself automates the sound waves to reduce environmental noise.
The technology delays one of the wave lengths to make it look like a straight-line i.e. zero noise.
In a nutshell, the technology adds up a wave and subtracts one resulting in zero waves of noise from the outer side.
The sound you hear through the headphones is 100% original and not mixed with environmental sound.
What’s special about the noise canceling headphones?
Unlike ordinary headphones, noise cancelation headphones have built-in microphones outside the ear cups.
The tiny earphones are there to capture the sound from the environment. After capturing the outer sound, the headphones’ technology creates exactly the appositive sound wave to eliminate them.
The appositive sound wave of the headphones results in zero percent availability of the noise. You will hear pure music from the headphones and not anything else.
The Bottom Line:
The technology is effective only if the noise level is limited.
If the outer noise is quite high, then the chances of getting noise through noise canceling headphones are high but with reduced noise, unlike the ordinary headphones which are quite reasonable.
Thankfully, we have a range of active and passive noise canceling headphones available in the market from trusted world-class brands.
You just need to explore the market well to find a suitable pair of noise canceling headphones to suit your needs.