This works for me- The sensitivity is a coarse setting for a particular site based on ground minerals and amount of small ferrous trash I do not want to hear bleeding thru into my headphones. After getting a good ground balance, I start the Threshold at -5 and sweep for a few minutes in the area I will later search. If it is quite, I increase the sensitivity and start again, if noisy, I DECREASE the THRESHOLD in increments of 10-25 until I find "relatively, quite, stable audio" over my area. Then use smaller increments to fine tune it dead on. If I never find quite audio at -95, then my sensitivity is too high so I reduce it and start the procedure over again at -5 Threshold. This method works as Mr. Payne pointed out- 1)it allows one to get max depth (ie.loud signal strength) on keepers, for a given amount of sensitivity, 2) while eliminating background noise from a)mineralization and b)ferrous discrimination bleed thru so you can mentally work 3) fatigue free with a 4) silent search detector and 5) cover more area, more effectively as others missed many keepers since their signals often blend into the background noise often refered to as CHATTER. 6) Don't buy a "Chatter box", buy a C$!!!
">