> if processing latency is greater than about 10 ms (IIRC) it drives the listener nuts and they won't wear the aid For context, sound travels about 3.4 metres

> if processing latency is greater than about 10 ms (IIRC) it drives the listener nuts and they won't wear the aid For context, sound travels about 3.4 metres (11 feet) in 10 milliseconds. Of course, this is added to the time taken for the sound to reach the microphone. Our brains apparently correct for this sort of lag without us noticing, but maybe (I have no idea) this correction is calibrated to perceived distance. https://www.wolframalpha.com/input/?i=speed+of+sound+*+10+milliseconds https://www.wolframalpha.com/input/?i=speed+of+sound+*+10+mi...