How Noise Canceling Headphones Work
How Noise Canceling Headphones Work
You can understand how difficult it is to upload a CD or power player on the plane, how difficult it is to play music while the engine is roaring!
Even keep the headphones humming the sound comes to the ears. However, using noise canceling headphones in such situations can easily turn on music or audio tracks.
Noise canceling headphones have technology built into them to block out any surrounding noise except the sound coming from the headphones. So the user of these headphones can experience music or other audio streams in a different way, even in a lot of noise.
Another big advantage of these headphones is that they are good for the ears. Increase the volume of the device if it is difficult to use while using normal headphones. Bad for some promotions at very high volumes. There is no need to turn up the volume too much even in noisy environments.
Active and Pave are the two main types of noise canceling headphones available.
All normal headphones have poor noise reduction or ambient noise cancellation. By using headphones that reduce noise, they are called 'passive noise canceling headphones'.
An active noise canceling headphone is specially designed to minimize the use. As such headphones are designed, high frequency or loud computer sound waves from the surrounding environment reach the ears of the users.
Active noise canceling headphones work in another way to reduce outside noise.
In this method, low frequency or low frequency sounds do not reach the user's ears. True The same computer noise comes out of the headphones to cancel out the low computer noise coming from outside. As a result, no surrounding words can be used.
Active noise canceling headphones mainly work through a few components inside. For example:
• Microphone - A microphone is attached to the part inside the ear hole in the headphones. The function of this microphone is to determine the external sounds which cannot be canceled initially.
• Noise canceling circuit – A noise canceling circuit is connected to the microphone itself. The function of this circuit is to identify the sounds coming from the microphone separately. The circuit basically determines the frequency and amplitude of the sound coming from outside. The exact same sound from the headphones is then projected exactly opposite to the sound wave coming from outside.
• Speakers – These sound waves generated by the headphones play through the speakers along with the audio to cancel out external noise. However, even if the sound waves come out with the music or audio playing in the headphones, our brain cannot separate these two types of sounds. As a result, the user does not hear any external sound. The way in which headphones cancel out external noise is called destructive interference in physics terms.
• Battery – The technology used in active noise canceling headphones requires electricity to operate. That's why a rechargeable battery is attached separately to the headphones.
It is mainly with these methods that active noise canceling headphones can cancel up to 20 decibels of sound waves compared to other ordinary headphones.
As a result, 70 percent of the sound from the outside environment cannot enter the user's ears. So noise canceling headphones come in handy in places where there is a lot of noise, from airplanes or trains to open-air offices.
Many complain about noise canceling headphones.
According to many, the sound quality in such headphones is somewhat poor. According to them, some sounds cannot be heard clearly in these headphones.
Others complain that they feel the air pressure inside the ear when using these headphones.
However, in the recently marketed headphones, some ports are provided behind the speaker to solve these problems. These ports adjust the air pressure inside and outside the ear.