Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!columbia!rutgers!clyde!cbatt!ihnp4!inuxc!iuvax!ndmath!milo From: milo@ndmath.UUCP (Greg Corson) Newsgroups: sci.electronics Subject: Waterproof Transducers/speakers Message-ID: <172@ndmath.UUCP> Date: Wed, 14-Jan-87 15:48:10 EST Article-I.D.: ndmath.172 Posted: Wed Jan 14 15:48:10 1987 Date-Received: Thu, 15-Jan-87 22:06:03 EST Organization: Math. Dept., Univ. of Notre Dame Lines: 17 Keywords: waterproof, ultrasonic, speaker, transducer, microphone Does anyone have any idea where I might be able to get a waterproof ultrasonic transducer? The type used in fish-finders might do but I would prefer something smaller if possible. I might also be able to use an underwater speaker/microphone (hydrophone?) that operates in the audio spectrum. The application will be transmitting computer data through water sonicly, ultrasonic components would be prefered because of the higher information bandwidth possible due to the high frequency carrier. I have dug through a lot of surplus catalogs but have had no luck so far, if you know where I could get something like this I would be very grateful Greg Corson ...seismo!iuvax!kangaro!milo P.S. For communications use I obviously need 2 of these things...so one of a kind components won't be of any use.