3 ms·
The energy is reaching your ear in the form of sound waves. The ANC tech (when done correctly) is sending an antiphase (inverse) wave with the same amplitude b
by davesmylie 4y ago
The energy is reaching your ear in the form of sound waves.
The ANC tech (when done correctly) is sending an antiphase (inverse) wave with the same amplitude but inverted phase timed exactly to the original sound wave.
Effectively the two waves destructively interfere with and cancel each other out - it's not 100% but when done well is pretty effective for regular/consistent sounds
- akira2501 4y agoIf it's not 100% for any particular reason then you are effectively adding noise and prolonging it's duration. I certainly wouldn't trust the speaker response to exactly match what the DSP is trying to produce over the wide range of audio that you could be listening to. It may even be worse if you're here a wide spectrum of noise as some components may be canceled while others, particularly high frequencies, may be amplified. I would always try to make passive cancellation work for my use case first, and only use active cancellation if it was absolutely required.