From: Wagner Lipnharski Subject: Re: Sound source angle detection > If you want to *try* to duplicate the human hearing system, start by > instal at least 10 microphones 5mm apart, in each "robot's ear", with > frequency band filters, digitize those 20 analog signals, and feed a > powerful processor that will create a spectrum-spacial map based on > phase, frequency and level... This was a very interesting and informative post, and it raises an issue. See how this project has ramped way up from its original humble beginnings? Lord a'mighty, to think we started out with two microphones and a li'l bitty algorithm! ;-} When we set out to emulate some behavior or function of a living "system" it's not always easy to decide whether to try to replicate the organic mechanism as closely as possible, vs. designing the function from scratch, optimized to hardware and software rather than brains and body. I always think of how we could've been flying two thousand years ago if we hadn't insisted on trying to mimic a bird's flapping wings. Bamboo and silk will make a very flyable Rogallo kite with not a single moving part. Actually, it'd be kind of fun to see how well you could do with just *three* microphones and a *medium size* algorithm...