For me I hunt 3 to 5 hours a day, and it takes about twenty minutes for my ears to really get tuned in to the threshold, from the outside noise, which in my case is the ocean wave crashing every 10 seconds. If someone stops me and wants to ask a question, after they leave the process starts all over again from removing my headphones. I have to tune in to the threshold again. But for later in the day do I do better, that's a tough question. I start detecting around noon, but I have hunted ten minutes and hit a gold ring. One morning I got a early start walk into the water, one minute later I got a gold ring, walked twenty feet got another gold ring, walked thirty or so and got another gold ring, didn't get a good target the rest of the day. I think it's just when you walk over it, how well you know your machine and if your not off to the races while detecting. I know everyone on this forum has gone all day with out getting anything to brag about, but maybe the next day bang, constant good hits. I guess that's the fun part of detecting you never know when your gonna hit a hot spot or the big one you can brag on for months.