COMBAT VEHICLES

A VARIETY OF ELECTRICAL/HYDRAULIC MOTORS, PUMPS, FANS, AND BLOWERS EMPLOYED WITHIN COMBAT VEHICLES IMPOSE UNACCEPTABLE NOISE LEVELS ON CREW MEMBERS. THIS INVESTIGATION ADDRESSES DEVELOPMENT AND EVALUATION OF A PROTOTYPE NOISE REDUCTION PROCESSOR SUITABLE FOR LATER IMPLEMENTATION WITHIN A SELF- CONTAINED HEADSET. COMMUNICATIONS BETWEEN CREW MEMBERS WOULDBE ACOUSTICALLY COUPLED WITH NOISE REDUCTION OCCURRING IN THE DESTINATION HEADSET. UTILIZATION OF A SIMPLE (BUT POWRFUL), SPEECH TRANSPARENT ALGORITHM IS PROPOSED. THE ANTICIPATED HARDWAER SIZE, COST, AND POWER, MADE POSSIBLE BY RECENT STRIDES IN VSLI, WOULD RENDER THE TECHNIQUE APPLICABLE SO A VARIETY OF PROBLEMS, INCLUDING NOISE REDUCTION IN RF COMMUNICATIONS; AND S/N ENHANCEMENTS FOR SPEECH ENCODERS. THIS EFFORT WOULD ENCOMPASS DEVELOPMENT OF A PRESSTYPE PROCESSOR, WITH EVALUATION TO ASSESS NOISE REDUCTION CAPABILITY AND QUALITY OF PROCESSED SPEECH. OPTIMUM (FIXED) PARAMETERS FOR A FUTURE (PHASE II) ADVANCED DEVELOPMENT MODEL (ADM) WOULD BE DETERMINED DURING THE TESTING .