Sine-wave speech  DEC 08 2008

Sine-wave speech -- artificially degraded speech that sounds like old Doctor Who sound effects -- can be difficult to understand but becomes clear once the listener knows what to listen for.

Listening to the sine-wave speech sound again produces a very different percept of a fully intelligible spoken sentence. This dramatic change in perception is an example of "perceptual insight" or pop-out. We have argued that this form of pop-out is an example of a top-down perceptual process produced by higher-level knowledge and expectations concerning sounds that can potentially be heard as speech.

(thx, tom)

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