Many environmentalists have failed to recognize that the preservation of quiet areas, places off-limits to noise pollution, should probably be a number-one environmental concern, not something we're going to get to later. And I say that because in that quiet is a whole experience that people can have that reaches to their soul. I like to think of quiet places in nature as the think tank of the soul. It's in these very basic levels that we'll be able to see what the real problem is.

Many environmentalists have failed to recognize that the preservation of quiet areas, places off-limits to noise pollution, should probably be a number-one environmental concern, not something we're going to get to later. And I say that because in that quiet is a whole experience that people can have that reaches to their soul. I like to think of quiet places in nature as the think tank of the soul. It's in these very basic levels that we'll be able to see what the real problem is.

You can listen to a birdsong, and from the content of the birdsong, you will be able to determine whether or not the bird grew up in a noise-polluted environment or whether it grew up in a pristine, clean environment. Isn't that incredible?

The birds are already evolving, changing the way that they sing as a result of noise pollution. And we have yet to do that. We're still not communicating. We're not changing our words. We are not testing, not providing this new lexicon for noise-polluted areas.

I'm very thankful, hearing impairment or not, that I've brought listening into my life. I will never say that I'm a good listener, however. Thinking that I was a good listener was one thing that kept me from being a good listener. It's a very dangerous thought. I just want to be better.

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.

I work in the same style as classic landscape photographers. You find the right perspective, and then you wait until the light is right. I do the same. I find the right location, and then I wait for the sound, the atmosphere to be right, and for the space to be revealed.