Have you ever wanted to enjoy your music or focus on your work without being bothered by annoying sounds around you? Well, that's where noise cancellation technology comes in.
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Noise cancelling is a type of audio equipment technology that can help reduce unwanted ambient noise using sophisticated working mechanism. They are especially useful in environments where there is a lot of background noise, such as on airplanes, trains, and busy offices.

Unlike traditional headphones or earbuds, which only block out some of the sound, noise canceling equipment uses advanced technology to analyze ambient noise and generate an opposing sound wave that effectively blocks out background noise, allowing you to enjoy your audio content in peace and quiet.

In this page, we will review how noise canceling technology actually work.

Noise cancelling feature uses advanced technology to reduce or eliminate unwanted background noise. There are two main types of technology used to achieve the noise cancelling effect: active noise cancellation (ANC) and passive noise isolation.

When using active noise cancellation, the noise cancellation process occurs in four steps:

Step 1: The incoming ambient sounds of outside noise (planes, trains, and cars) try to break through the earplug barrier.

Step 2: Inside the equipment is a microphone that picks up the sounds and sends them through the noise-canceling process.

Step 3: A noise cancellation circuit reverses the wave to create a new waveform and sends it to the speaker.

Step 4: The original sound and the new waveform meet and cancel each other out, clearing your music of those annoying distracting sounds.

With ANC technology,  you can spend hours at the gym without distractions, walk outside without listening to cars and horns, and listen to your headset on a plane as it takes off.

Passive noise isolation, on the other hand, relies on the physical properties of the headphone ear cups to block out external noise. These headphones use materials that can absorb sound, such as foam or other acoustic materials, to reduce the amount of outside noise entering the ear.

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Sources:

1. https://pmc.ncbi.nlm.nih.gov/articles/PMC9408706/
2. https://pubmed.ncbi.nlm.nih.gov/37837796/