The demand for noise reduction headphones has increased rapidly in the last decade. These headphones utilize technology made for military pilots of helicopters and airplanes to minimize and block out the noise of jet engines and rotor blades entirely. This allows you to hear what exactly is being broadcast.
Your iPod sounds only as good as the headphones you use to listen to it. For normal use, the stock Apple iPod headphones may work perfectly fine. However at some point you may wonder is there are any iPod headphones out there that could offer crisper highs, more booming lows and better overall sound quality.
If you are one of the many people who love the sound quality of movies in theatres but hates the hassles (crying babies, people talking, cell phones ringing, etc), then I hope you are seriously contemplating the value that a home theatre or surround sound system could bring to your movie enjoyment.