In this program, pure Beta window frequencies bring you to a high-powered, high-performance brain state ideal for quick thinking and deep concentration. Boost your ability to focus mentally and concentrate for extended periods of time. The program's subtle, nondistracting sounds make it ideal for use while you work, study or write. Psychiatrists and therapists have found High Focus beneficial in treating Attention Deficit Disorder. Athletes and sports trainers tell us it's excellent preparation for physical activities that involve hand-eye coordination, such as tennis or golf. Beta frequencies and the nondistracting sound of wind.
I don't know how to tell if the tape is working or not. It is just a noise, like some tide waves, or maybe wind in the trees. When I listen to it in the headphones, the tape puts me to sleep rather than helps me concentrate. I am not sure why. But the tape got me interested in the subject of different window frequencies, and I have downloaded a few more "sound tracks". They seems to be working a bit better.