Live noise-free. Boost your music. This is the main advantage of Active Noise Cancelling technology in headphones or neckbands. Active noise control, or Active Noise Cancellation (ANC), is a system that allows you to cancel out unwanted noise.
As you know, sound is transmitted in the form of sound waves. These waves produce different sounds, and these merge together to form a single sound. This is what our ears perceive. When we have sound waves of the same frequency in the same space, we call it interference.
What types of noise cancellation are there?
As you know, sound is transmitted in the form of sound waves. These waves produce different sounds, and these merge together to form a single sound. This is what our ears perceive. When we have sound waves of the same frequency in the same space, we call it interference.
What types of noise cancellation are there?
- Passive Noise Cancellation: This is noise cancellation provided by the headset itself. Its performance is primarily influenced by the design and materials used in its construction. All headphones offer a certain level of isolation, although those that completely cover the ear tend to be more effective. They try to avoid leaving any open spaces through which external sounds can penetrate.
- Active Noise Cancellation: This digitally processes noise when it reaches the earpiece, generating a signal that "cancels" it. These are actually microphones built into the earpiece's internal structure. These capture ambient noise and apply processing algorithms to generate a signal through the earpiece that reduces or cancels the surrounding noise.
Active Noise Cancelling microphone position
- Microphone on the outside of the device: This solution allows for early detection of external sounds, allowing for more effective correction of noise at frequencies up to 1-2 kHz. The negative effect is the lack of information the microphone receives about what is actually reaching the ear. The lack of feedback can lead to incorrect cancellation if, for example, the user does not position the headphones correctly.
- Microphone inside the device: With this configuration, the microphone picks up the same amount of sound as we do, so it can adapt the signal more precisely even if the headphone position isn't optimal. On the downside, high-frequency reduction isn't as effective. The microphone is located above the speaker, capturing noise that doesn't match the reproduced sound, digitally processing it to send the signal that reduces it.
- Microphones on the outside and inside of the device: This system is the most comprehensive, combining the advantages of the two previous configurations. It filters a wide range of frequencies, can adapt the signal based on the actual frequency of the ear canal, and is flexible with earpiece placement. On the downside, the complexity of the system requires very precise programming to avoid the disadvantages of both previous systems. Furthermore, as expected, the price is considerably higher.
We designed Energy Sistem headphones with Active Noise Cancelling (ANC) to achieve the best price-performance ratio. Therefore, we consider not only the digital noise cancellation solution but also the passive noise reduction design. We must never forget the ultimate goal of headphones: sound reproduction. This is why the devices are designed so you can listen to the music you prefer at any time.
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