About 5-7 yrs ago, a couple guys rolled into Huron looking for a place to hunt. A local store clerk helped them to hook up with our party on a friend's farm. One of them had a high end ESP or equivalent. When we got into the corn, he came out shaking his head and fussing with the volume/gain. Finally, he gave up on them in the corn. 'Said it sounded really loud in the corn.