You sure hit the iron nail on the head with this one. In heavy trash such as an old park I will turn the sensitivity down to 16, factor preset, or even lower and also the Audio Gain down from 10 to less than 5 but find 6 works nice.
Sensitivity is how we adjust the dynamic range of hits above the threshold. A weak target is not only a deep target but one on the fringe of the electromagnetic footprint of the coil. This in in part the idea of using a smaller coil. If we cut the sensitivity down then we have less tagets to deal with.
Where it does not help is on large shallow iron that is not on the fringe of the footprint. A large piece of shallow iron will cause the same null no matter where the sensitivity is set. Anyhow, as you are making a very good point since we seem to want to run sensitivity as high as we can thinking we will get deeper older coins. <span style="background-color:#ffff00;">My personal opinion to to run the sensitivity and audio gain at the setting where we have the greatest stability and cleanest hits.</span> When those crosshairs, digital reading, and tones get shaky and noise cancel will not help them decreasing the sensitivity is sure in order. I believe we get more depth if the detector is rock solid. On test coins and in th field I have had problems with the reading and decreased the sensitivity and the tone, digital readings, and crosshairs improve greatly.
Somewhere down the page and in several post I try to point out if we like patterns then they are in conjunction with the other settings. Sensitivity, audio gain, ferrous or conductive sounds are some of the major ones. Setting the threshold tone, variability, and limits have a lot to do which what a specific user hears. All of these setting are very important and not just the pattern.
Great suggestion about decreasing sensitivity and glad you reminded all of us that we may do better with less sensitivity in some situations.
Have a great Saturday,
HH, Cody
