We think the problem is out there, when the problem is really in here - who we are and how we experience the world around us. The acoustic ecologist listens, as the primary sense, to the world around us, and I believe that they have a significant contribution to make to all environmental groups who think that they're solving environmental problems, when we're actually all on a spiritual pilgrimage.

I used to hate the urban environment and the urban din. But I realize now that it's really not that much different than living next to a waterfall for wildlife. Most wildlife - unless they're specifically adapted - avoid being around a waterfall or whitewater streams and rivers because it jams their sense of surveillance. They are more vulnerable, and their message loses intelligibility. Now, the ouzel is able to overcome that in various ways. Back to the urban environment, we're talking and delivering messages as if we weren't next to a waterfall, and that's a problem.

I would say that to listen is to become aware. To become truly informed. You will discover whatever you do.

If you're going to listen, you have to be willing to be changed by what you've heard. My life has gone through so many changes. I'm sixty-two years old right now, and I'm as busy changing now as I was when I was a teenager, or in my twenties. Every day is different. Every day brings new information.

The normal way of gathering information is through sound: when you hear information that you want to gather, you look in its direction, you see what it is, if you choose you can get closer, you can see it, you can touch, and then, finally, the most committed form of data gathering is to taste it and eat it. But for the urbanite, we're cut off from our primary sense, and I want to stress that - our primary sense of gathering information about the place that we're living in - and instead, we're in a war zone.

The most sensitive frequencies are at the resonant frequencies of the auditory canal. In other words, the ear has shaped itself to naturally amplify certain bandwidth. And that corresponds to sounds in that bandwidth that were most important to our evolving ancestors to hear, in order to survive. And it doesn't match the human voice. It matches birdsong.

The earth has continued to change, from rapid climatic changes that have caused the glaciers and the ice sheets to basically bulldoze the landscape and cause species compression in the tropics and cause mass species extinction - you know, all these huge changes. In terms of evolution, every species is doomed to eventual extinction. The natural world is constantly changing. So, to deal with "environmental problems," in quotes, totally misses the issue. That is not the way we want to define our problem if we're going to find our solution.