Great interview on Wired with one Dr. Michael Bull. He talks about how the iPod and other portable music devices are used to control one's environment. Below is an excerpt, read the full interview with Dr. Bull at Wired.

For example, a lot of people use it to go to work, for commuting. I found that they use the same music on a regular basis. They will often play the same half-dozen tunes for three months, and each part of the journey has its own tune...

It gives them control of the journey, the timing of the journey and the space they are moving through. It's a generalization, but the main use (of the iPod) is control. People like to be in control. They are controlling their space, their time and their interaction ... and they're having a good time. That can't be understated -- it gives them a lot of pleasure.

So, for example, music allows people to use their eyes when they're listening in public. I call it nonreciprocal looking. Listening to music lets you look at someone but don't look at them when they look back. The earplugs tell them you're otherwise engaged. It's a great urban strategy for controlling interaction.

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