Speech Communication Capability and Hearing Protection of USAF Inflight Headgear Devices,

摘要

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 110dB in each octave band from 63Hz to 2kHz and 105dB in the 4kHz and 8kHz 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.