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How Does Active Noise Cancelling Work? Detailed Guide

In today's bustling world, finding solace in silence seems like an impossible dream. However, thanks to the marvel of technology, active noise cancelling (ANC) has emerged as a game-changer. Whether you're a frequent traveler, a music enthusiast, or simply seeking respite from the cacophony of daily life, ANC has become an indispensable feature in many audio devices. But have you ever wondered what is noise cancelling earbuds, and how do noise cancelling earbuds work? In this comprehensive guide, we'll delve into the inner workings of active noise cancelling technology, compare it to PNC, and recommend our top pick of ANC earbuds. Explore now!


How Does Active Noise Cancelling Work

What is active noise cancellation and how does noise cancellation work? At its core, Active Noise Cancelling (ANC) operates on the principle of destructive interference. Below is a detailed account of what do noise cancelling headphones do when they employ ANC.

Microphone Pickup: ANC headphones or earbuds are equipped with built-in microphones that capture the sounds in your environment. The sound can be the hustle and bustle of city streets, the speaking sound of people around, etc.

Sound Analysis: The captured audio signals are processed and analyzed in real time by the ANC circuitry or software. This analysis helps identify the specific frequencies and characteristics of the ambient noise.

Anti-Noise Generation: Once the ambient noise is analyzed, the ANC system generates anti-noise signals that are precisely tailored to cancel out the identified frequencies and characteristics of the external sounds. These anti-noise signals have the opposite waveform or phase to the ambient noise.

Mixing Anti-Noise with Audio: The anti-noise signals are mixed with the audio playback in your headphones. When the anti-noise and the external noise meet, they interfere with each other, resulting in destructive interference. This interference causes the cancellation of the external noise, effectively reducing its impact.

Real-Time Adjustment: The ANC system continuously monitors the ambient noise and adjusts the anti-noise signals accordingly. This ensures that the cancellation remains effective even if the external noise changes in frequency or intensity.

These are basically how does noise cancelling work. With the steps outlined above, ANC can effectively cancel ambient noise and create a peaceful oasis in our ears.

Active Noise Cancelling vs Passive

Aside from active noise cancelling technology, there is also passive noise cancelling. They are both approaches to combating unwanted noise. 

Passive noise isolation relies on physical barriers like ear cups or ear tips to block out ambient sounds. This purely mechanical approach is effective in reducing higher-pitched ambient sound as well as sudden outbursts of sound. Active noise cancelling, on the other hand, utilizes electronic components to produce an inverse sound wave, which can eliminate ambient noise.

Compared to PNC, ANC is more sophisticated, and does a better job of reducing low-frequency droning sounds. However, ANC may not perform as well as PNC when it comes to sudden sounds.

What Are the Best ANC Earbuds

Below are two top contenders for the best ANC earbuds.

soundcore Liberty 4 NC

Crafted with love by soundcore, this exquisite pair of earbuds explain perfectly what does noise cancelling mean. With its advanced adaptive ANC technology, this exceptional device reduces ambient noise by a whopping 98.5%, guaranteeing ultimate quietness in noisy environments and leaving only music to enjoy. Moreover, it features LDAC technology, allowing high-resolution sound over Bluetooth 5.3. With 10 hours of playtime on a single charge, or 50 hours with a charging case, you can embark on a virtually uninterrupted music journey with soundcore Liberty 4 NC. In addition, its IPX4 water resistance rating also eliminates any worries about spills and rains. In short, with unmatched quality and unrivaled performance, the soundcore Liberty 4 ANC Earbuds are definitely something you can’t neglect.



soundcore Life P3 Noise Cancelling Earbuds

Another model of unbeatable quality, the soundcore Life P3 ANC earbuds feature multimode noise cancelling, which means they can sync their ANC to different locations, like indoors, outdoors, public transport, and so on. Moreover, the 11mm composite drivers create a strong bass, adding greatly to its acoustic effect. Furthermore, equipped with 6 microphones, the call performance is drastically enhanced, and your voice is picked up with more clarity than ever.




We hope that after reading the post above, you are clear about the topics: what is anc headphones, and how does active noise cancelling work. In conclusion, active noise cancelling (ANC) technology has revolutionized our auditory experiences by providing a sanctuary of tranquility amidst a cacophonous world. Through the intricate process of capturing ambient sounds and generating anti-noise waves, ANC has the power to neutralize unwanted noise and immerse us in pure audio bliss. By understanding how do noise canceling headphones work and learning about the best ANC earbuds on the market, we can better appreciate the marvel of this technology and embrace the serenity it brings to our lives.


Is Active Noise Cancelling Safe for Your Ears?

Active noise cancelling (ANC) technology is generally considered safe for your ears. The process of ANC primarily involves analyzing and canceling out external sounds so that you don’t have to raise the volume to hear things clearly and impact your ear health as a result.

However, it's important to use ANC devices responsibly and in moderation. Prolonged exposure to loud volumes, whether with or without ANC, can still pose risks to your hearing.

Why Can I Still Hear With Noise Cancelling Earbuds?

This can be attributed to a few factors.

First, noise cancellation is more effective at eliminating low-frequency sounds than high-frequency ones. So, high-pitched noises may still be audible.

Additionally, ANC is more effective at canceling continuous or predictable sounds than sudden or unpredictable ones.

Furthermore, the fit and seal of the earbuds in your ears can affect their effectiveness. If the earbuds don't create a tight seal, external noise may leak in. In this case, adjusting the fit and using proper ear tips can enhance the noise-cancelling capabilities.

soundcore noise canclling earbuds are designed elaborately for the comfort of long listening sessions. And the personalized noise canceling technology applied to the advanced true wireless earbuds blocks out up to 98.5% of ambient noise for you, ensuring a peaceful listening environment.

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Liberty 4 NC | True-Wireless Noise Cancelling Earbuds

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Liberty 4 | High-Quality Sound True Wireless Earbuds

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Liberty 4 NC | True-Wireless Noise Cancelling Earbuds
All-New True-Wireless Earbuds Reduce Noise By Up to 98.5%
  • Reduce noise by up to 98.5% with our advanced noise cancelling system
  • Adaptive ANC 2.0 adapts to ears and environment in real-time
  • 11mm drivers, Hi-Res Wireless and LDAC technology for crisp sound
  • Full adjustable EQ with Hear ID 2.0 for a tailored sound profile
  • 10/50 hours of battery for long-lasting quiet
  • Fast Pair and Bluetooth 5.3 multi-point connection
  • IPX4 water-resistance against spills and rain
  • 6 mics and an AI algorithm enable crystal clear calls
  • Note: Please refer to our FAQ and How-To-Video for additional tips on pairing your Liberty 4 NC earbuds with a Samsung Galaxy S23 series mobile phone.