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Development of a Voice Projection System for Masked Firefighters

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Fire fighters often wear protective breathing devices utilizing face masks. Voice communication through these masks is very difficult, especially in noisy locations. A comprehensive study of the electroacoustic and mechanical requirements for a high-quality fire fighter's speech projection system has been made. A system tailored to a new U.S. Navy breathing apparatus has been developed, giving highly intelligible voice communications to the user.

JAES Volume 24 Issue 4 pp. 281-284; May 1976
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AES - Audio Engineering Society