Researchers from the 1940's through the present have found that normal, sighted people can echolocate - that is, detect properties of silent objects by attending to sound reflected from them. We argue that echolocation is a normal part of our perceptual experience and that there is something 'it is like' to echolocate. Furthermore, we argue that people are often grossly mistaken about their experience of echolocation. If so, echolocation provides a counterexample to the view that we cannot be mistaken about (...) our own current phenomenology. (shrink)

The global array might prove to be an important and even necessary concept for explaining some multi-modal phenomena from the specificational perspective. However, we suspect that specification exists in energy arrays detectable by single or multiple sensory systems. We argue for a more general modality-neutral perspective and review results from recent research on audiovisual speech perception.