From: Terrance King Subject: NEW-PROD: Binaural Sound Recording Date: Fri, 17 Nov 1995 06:42:02 -0800 (PST) An old friend of mine named Leonard Lombardo has a method patent on a microphone set designed for "binaural" 3D stereo sound recording. He manufactures them himself. The pair of sub-miniature pick-ups (about the size of the tip of a little finger) attach to the earpieces of the user's glasses. The actual sensor hangs down slightly from the spectacle frame just in front of the recordist's ear's pinnae. The black wires hang down the back of the neck and the whole assembly looks like a normal retaining string for glasses. The unobtrusive appearance makes them ideal for clandestine recording (Grateful Dead [sigh] fans are among his most loyal customers). Leonard is an audiophile-perfectionist of the first order. His mics are little gems. They are very sensitive with an extraordinary dynamic range. The frequency response is very flat and he matches the gain of the "standard" individual mics in each set +/- 1 db. A "signature" model is available where each mic in the pair is gain and phase matched +/- 0.25 db (almost perfect phase matching gives the best 3d acoustic image). He can supply any kind of plug, a phantom power supply for recorders lacking mic power out, balanced or unbalanced output, etc. He also makes a superb matched sub-miniature preamp for line level output. The perceived quality of the recorded sound is remarkable. These mics are true professional instruments comparable to the very expensive Sennheiser "heads" (I forget the German name for the faux heads). These mics give excellent results when played back through speakers, maintaining the psycho-acoustic space without headphones. Leonard is something of a "net-phobe" so he has no e-mail address and no web page. His info: Sonic Studios 438 Soup Creek Road Reedsport, OR 97467 voice (503) 599 2217 fax (503) 599 2218 If you really want to e-mail me, go ahead and I will forward. I have no financial interest in the above. Terry King teryking@u.washington.edu [MODERATOR'S NOTE: Commercial postings are offered on this newsgroup as a public service. Their appearance here does not indicate endorsement by the moderators or by the USENET or its administrators.]