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Joe, To add further detail, these first four consoles are being made from old "Sonic Wave" fathometer enclosures and may not be suitable for smaller (k250) submarines. Not to worry, as an effort to reduce this by at least half is already underway. The reason for the larger initial enclosures is that these provide adequate room for modifications and upgrades without the possible need to start completely from scratch. (get it up and running and work on making it smaller as it is proven of worth.) For example, This form of voice transmitter is said to be able to handle 30 watts of sound energy... The electronics so far produced put out a whopping 7 watts only! So an upgrade may later be installed with much breater ease than finding addition room later that would utilize this transmitter more fully. I will send you an attachment that will demonstate this exercise in making these smaller. David Bartsch From: joeperkel@hotmail.com To: personal_submersibles@psubs.org Subject: RE: [PSUBS-MAILIST] sound transducers Date: Fri, 14 Nov 2008 21:55:29 +0000 David, Not having any field experiences and out of curiosity, this brings to mind a question regarding underwater voice transmission in general. I've seen voice comm between Alvin and Atlantis, Calypso and the saucers, habitats,...etc. Is this voice comm severely scrambled (distorted by the seawater), and then reprocessed by the receiving equipment? Or, put another way, if I swim between divers with voice comm equipment, could I hear the conversation like I do prop noises? Joe From: dbartsch2236@hotmail.com To: personal_submersibles@psubs.org Subject: [PSUBS-MAILIST] sound transducers Date: Fri, 14 Nov 2008 15:36:04 -0500 To all: The transducer for solids from which can be made the broadband voice transmitters are available on e-bay under "underwater speaker" at this time. These are selling for $26.95 but shipping is being provided. This is not a bad price if you were concidering delving into this area of study. With a singing machine that is battery operated, a voice transmitter can be made from the use of this. (It still needs to be imbedded in molding plastic to survive deep depths.) And you will still need a means of hearing the return responce. It sure would be great to talk back and forth between two submerged submarines or to your support boat without having to surface first. David Bartsch Windows Live Hotmail now works up to 70% faster. Sign up today. Get 5 GB of storage with Windows Live Hotmail. Sign up today. |