“…But, as Arthur C. Clarke once observed "If an elderly but distinguished scientist says that something is possible he is almost certainly right, but if he says that it is impossible he is very probably wrong." 1 In Europe, since the mid-1990's, DLR has developed phased microphone arrays as a field measurement tool for use in aircraft flight tests, originally to measure airframe noise. Michel 2 reported that an acoustic array could be used to separate airframe and jet noise sources using a microphone array to examine noise from a military aircraft flying by the array.…”