> An enclosed helmet that "hears" like a human, but filters the spikes (powering your iPod in the process)? A friend of mine is a big hunter; he has over-the-e

> An enclosed helmet that "hears" like a human, but filters the spikes (powering your iPod in the process)? A friend of mine is a big hunter; he has over-the-ear hearing protectors (battery-powered electronics) that do just that.