ABSTRACT
Audition is one good place to start. Sound is widely used among living creatures, going far back, it seems, in the long evolution of animals. It is one of the first senses to which we become alive: we hear sounds even in the womb and from their first hours humans use the auditory channel to declare their existence and interact with those around them. Through sound we actively assert our presence and draw notice from others, and we also formulate and learn our own identity from hearing the very sounds we ourselves make. Here we have a fundamental resource which human beings exploit in manifold ways to create and maintain contact with each other.1
