Do you know how Active Noise Cancelling works?

The acronym ANC stands for Active Noise Cancelling. Essentially, the idea is to eliminate annoying outside noise so you can listen to what really matters: your music. This is the new Energy Headphones BT Travel 7, ideal for giving you those quiet moments while traveling.

This technology originated in the 1950s, when headsets were developed for airplane and helicopter pilots, due to their need to communicate in high-noise environments. Later, this technology gradually migrated to more commercial fields until today, where it is common to find headsets that implement it.

But how do you eliminate outside noise without affecting the sound of the music I want to listen to? Before answering this question, it's necessary to differentiate between the two types of noise cancellation: active noise cancellation and passive noise cancellation.

Passive noise cancellation involves blocking or reducing all outside noise or sound through acoustic insulation, such as earplugs or the padded wall of a soundproof room. In fact, all headphones achieve passive noise cancellation to a greater or lesser extent.

However, active noise cancellation, the type of noise we're interested in here, works differently. It captures the sound waves of noises using a microphone built into the headphones and produces a new, opposing wave. The combined result is a much more attenuated wave, which is therefore less bothersome. Something similar is shown in this image:

Therefore, the external noise that initially bothered us when listening to music with our headphones is minimized, allowing us to optimally hear what we really want to hear: our favorite music. Let us know if you found this interesting.