Signal range, amplitude and distance cues

Dr. Laurance Doyle is an astrophysicist and principal investigator at SETI (Search for Extraterrestrial Intelligence) with expertise in diverse subjects including extrasolar planets, signal processing and communications theory. He has worked on image analysis from the Voyager mission and Halley's Comet, developed statistical methodologies to search for extrasolar planets, and is applying those tools to analyze complex patterns and search for meaning in animal communications.