Speech Communication Capability and Hearing Protection of USAF Inflight Headgear Devices
AIR FORCE AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OH
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In this investigation, both speech intelligibility and hearing protection were determined for various USAF inflight communication headgear devices. Speech intelligibility was measured with talker to listener relationships of quiet to quiet, quiet to noise, noise to quiet and noise to noise. The noise used for both talking and listening was set to 110 dB in each octave band from 63 Hz to 2 kHz and 105 dB in the 4 kHz and 8 kHz octave bands. Speech materials were recorded using both boom kiss-to-talk and oxygen mask microphones. The results reveal that many noise exposure conditions now specified as satisfactory for military aircraft may be in the range where adequate speech communication cannot be maintained.
- Military Aircraft Operations
- Voice Communications