I currently have a car, work, and home stereo that can broadcast as low as 5Hz. I have noticed no discernible effect after listening for several days other than irritable bowls on the first day most probably unrelated.
Despite many claims, I must classify this item as a perceived sense of wellness or as a placebo effect. Some even claim that shifts in the earth's Schumann resonance are related to the end times, the earth's alignment with other planets, free energy, and the Aztec's calendar's end.
I have provided a link under the "Very Useful Websites" section pointing to charts monitoring the earth's resonance that debunk the rumor that it is increasing and dismissing claims that the world will end on December 21st of 2012.
I have no doubt that this resonance can be tapped for energy and is related to pyramid point energies but see no usefulness for applications towards life extension. Ideally you could try to channel this frequency through your body using the typical Egyptian method of copper on one extremity and zinc at the other. A nice link to purchase these items has also been provided under the "Very Useful Websites" section.