How do noise reduction headphones work


When you don on a pair of headphones, you expect that they will provide you with a true listening experience. Ambient noise is the one thing that can mar your enjoyment and this is why the noise reduction headphones had to be created. Noise reduction headphones are capable of reducing ambient noise to a level where that noise will not cause any interference with your listening pleasure. Before purchasing such headphones, it is important that you understand more about how do noise reduction headphones work.

How do noise reduction headphones work

Noise reduction headphones –different technologies

Before understanding more about how do noise reduction headphones work, it is important to also familiarise yourself with the different kinds of noise reduction technologies. There are, for example, passive and active noise reduction methods and then there are noise isolation techniques that need to be understood. Modern headphones are quite sophisticated and if you pick the right ones, you will obviously get more out of them.

Active noise reduction

Active noise reduction technologies are very advanced and when used, they can provide superior sound quality. Given the fact that today there is high amount of noise pollution it makes sense to invest in noise reduction headphones. The earliest use of such headphones can be traced to the fifties when they were used in the cockpits of planes and helicopters. The commercial variety was introduced much later.

To understand more about how do noise reduction headphones work, it is important to take a look at the mechanism that helps in reducing noise. There are active noise reduction technologies and passive noise reduction technologies that work in different ways but which end up achieving more or less the same objectives.

Passive noise reduction

To learn about how do noise reduction headphones work in passive noise reduction headphones you will need to understand that the noise is reduced by actually blocking the sound from entering the ear. In other words, the ears are insulated against outside noises and in may ways this means that the same principals are applied as in the case of an earplug.

It also pays to learn about how do noise reduction headphones work in active noise reduction headphones. In this case, the noise is reduced through use of special electronic technology. To understand how do noise reduction headphones work in this case you will need to take a look at the electronics that are used. There is circumaural earphones which along with circuits that cancel out sound will help to cut out ambient noise. First of all, the headphones will create their own ambient noise and this is recorded by a microphone which is also connected to the circuit that handles the noise reduction work. This circuit will then block the sound and in this way effectively eliminates or reduces ambient noise.

The circuit that does the actual noise reduction work makes use of the properties of sound waves with which to cancel out the ambient sounds. It will generate inverse signals that are the opposite of the sound waves produced by noise. This helps in cutting out the ambient sound and this is essentially how do noise reduction headphones work with active noise reduction technology.