Voice Communications Effectiveness of the All-Purpose MCU-2/P Chemical Defense Protective Mask
Abstract
The voice communications effectiveness of the all-purpose MCU-2/P chemical defense protective mask for use by all ground personnel was evaluated in a laboratory study. Speech intelligibility was measured for the MCU-2/P under face to face communications conditions and when interfaced with a commercial telephone handset, a security police 'walkie talkie' handset and the H-133 ground communications headset-microphone units. These communications configurations were evaluated in selected noise environments that ranged from 77 dB to 115 dB sound pressure level (SPL) re 20 microns Pa. The MCU-2/P mask and hood exhibited good speech intelligibility for all communication configurations in the 77 dB noise condition. However, voice communication was not satisfactory for personnel wearing the mask and hood under the same communications situations in the higher levels of the noise. Factors that contributed to or caused the voice communications to be unsatisfactory are discussed in the report. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1985
- Accession Number
- ADA265498
Entities
People
- Charles W. Nixon
- William H. Decker
Organizations
- Armstrong Laboratory