![]() ![]() It can’t deal as well with higher-frequency sounds, so it’s not as effective as feedforward ANC at suppressing noise in the 1–2 kHz range. Another advantage is that even if the headset is worn in an odd way or doesn’t quite cover the ears, feedback ANC can account for this, at least to some extent. Feedback ANC also works on a broader range of frequencies. Feedback ANC setupīecause it hears what the person hears, feedback ANC can better adapt to variations and correct the signal if needed. In the feedback setup, the mic lives inside the ear cup and in front of the speaker, so it gets to hear the resulting signal in exactly the same way the listener does. Feedback active noise cancellation (Mic inside the ear cup) And because the mic is closer to the outside world, it’s more sensitive to wind noise. So, if you focus on reducing noise at around 1 kHz, feedforward ANC may end up having little effect at lower frequencies. On top of that, feedforward ANC works within a narrower range of frequencies. It just assumes the listener won’t hear any noise and goes, “Welp, my job here is done.” If the person places the headset incorrectly or if the noise is coming in at a weird angle, this setup can accidentally end up amplifying the noise at some frequencies. This setup has no way to self-correct, since it never hears the anti-noise it makes. This also means that it’s better at reducing higher-frequency noise up to 1–2 kHz. The mic picks up the noise early on, so it has more time to respond and generate the anti-noise. ANC then processes the noise and creates the anti-noise before sending the resulting signal to the headset speaker. ![]() The mic hears the noise before the person does. In a feedforward setup, the microphone is placed outside the ear cup. ![]() Feedforward active noise cancellation (Mic outside the ear cup) Each approach has its good and bad sides. While the basic ANC concept is the same, it can be implemented in three different ways: feedforward, feedback, and hybrid. Let’s dig a bit deeper: The three types of active noise cancellation Why does this happen? The short version is that there are different types of active noise cancellation and that headset design itself plays a big role. Here’s a good video that illustrates this: There are many other things that make a great ANC headset. But getting active noise cancellation to work well is about more than just throwing some ready-made tech inside the headset and slapping “ANC” on the packaging. They all claim to cancel low-frequency noise. Since then, lots of music headsets with active noise cancellation have hit the market.
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