[petra]

Active Noise cancelling(ANC) headphones are really sensitive to latency.

Take An ANC with 0 latency, that stops cancelling noise at 8 khz, and add a 50 usec latency to it, now will stop cancelling noise at ~1.5 khz.

But This article talks about 20ms latency.

[Judgmentality]

> Take An ANC with 0 latency, that stops cancelling noise at 8 khz, and add a 50 usec latency to it, now will stop cancelling noise at ~1.5 khz.

How did you calculate this?

[petra]

It's an simple explanation of figure 3 here: https://www.edn.com/design/analog/4458544/2/A-perspective-on...

[wrycoder]

If I understand that figure correctly, at 8KHz with no latency one gets 12 dB cancellation. With 50 ms latency, 0 dB. And above that frequency, the cancellation actually makes the noise worse. An analog cutoff filter would be needed.