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?

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 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.

Noise pollution is basically defined as the presence of simple information that makes it impossible to hear all the other more delicate - and often more important - information. Noise pollution creates, if you will, dumb environments. Our industrial areas, many of our downtown urban areas, are dumb acoustic environments. Very simple, very loud, often unhealthy.

Acoustic ecology is the study of information systems: the shared acoustic environment and how species send and receive messages in this shared acoustic environment. What these messages mean - meaning, what are the consequences and the changes of behavior in any species. And it has as much to do with us individually and biologically as it does with the shaping of cultures and beliefs.

Most people think visual information is more important than aural information - like, what's this big deal about sound? And why should I bother to listen, rather than look? And here are the facts: there are blind species, in the backs of the caves, the bottoms of the oceans. It's not essential on planet Earth to be able to see, to be a species. But there are no deaf animal species. You have to be able to hear, or you won't get the information you need in order to survive.

What visual information does is it creates priorities. You cannot know with certainty what lies behind something else. There are very few transparent materials in the natural world or the built environment. And so we deal with things superficially, and we deal with what's in front of us, not what's behind our head that we can't see, or to the left or the right. Visualists are often linear and timeline-oriented, whereas the natural condition and the natural way of problem-solving throughout evolution is to be multitasking.