SOUND ATTENUATION CHARACTERISTICS OF THE NAVY BPH-2 HELMET
ARMY AEROMEDICAL RESEARCH UNIT FORT RUCKER AL
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An evaluation of the real-ear sound attenuation characteristics of the Navy BPH-2 helmet was done with procedures and equipment specified by ASA Z24.22-1957. The results show that the BPH-2 has acoustical characteristics superior to the standard Army APH-5 at frequencies from 125 Hz through 1000 Hz. In view of the high attenuation in the speech communications spectrum, it is recommended that this helmet be considered for use by the U. S. Army.
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