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 cancellati

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.