Acoustic Mouthpiece Skullborne Audio Information System for the Rebreather

Award Information
Agency: Department of Defense
Branch: Special Operations Command
Contract: N/A
Agency Tracking Number: 36048
Amount: $99,137.00
Phase: Phase I
Program: SBIR
Awards Year: 1997
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
PO Box 2603, Columbus, IN, 47202
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 David F. May
 (812) 376-6472
Business Contact
Phone: () -
Research Institution
The successful development of an acoustic mouthpiece based audio in formation system for rebreathing apparatus will revolutionize military, professional, and recreational diving. The system proposed provides the diver with voice and tonal audio imformation regarding depth, bottom time, tank pressure, gas mixture data, time, temperature, and any other critical information which is available from a dive computer or rebreather console. Use of this system will greatly reduce the delectability of a diver by elimination of the visible console, audible beeps, amd magnetic signature. The means by which the user hears the sound is with a proprietary acoustic mouthpiece, whereby the user hears through bone and hard tissue vibration originating in the mouth. This concept provides the diver awith excellent quality, loud and intelligible sound without the need for additinal headgear such as a facemask, hood, earphone, or helmet. The special mouthpiece encloses a novel transducer/propagation system based on Terfenol-D, a magnetostrictive, low voltage oscillation source. In order to confirm feasibility, the mouthpiece will be excited by an electronic circuit which awill utilize a conventional dive computer interfaced with a microprocessor based voice synthesis circuit. Water testing of the system adapted to a rebreather and audiological evaluations will determine intelligibility.

* Information listed above is at the time of submission. *

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