4 ms·
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 la
by petra 8y ago
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 8y ago> 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 8y agoIt's an simple explanation of figure 3 here: https://www.edn.com/design/analog/4458544/2/A-perspective-on-digital-ANC-solutions-in-a-low-latency-dominated-world https://www.edn.com/design/analog/4458544/2/A-perspective-on...
- wrycoder 8y agoIf 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.