Accession Number:

AD0656748

Title:

SOUND ATTENUATION CHARACTERISTICS OF THE NAVY SPH-3 (MODIFIED) (LS) HELMET

Descriptive Note:

Corporate Author:

ARMY AEROMEDICAL RESEARCH UNIT FORT RUCKER AL

Personal Author(s):

• Cam, Jr., Robert T.
• Keiser, Robert L.

Report Date:

1967-05-01

Pagination or Media Count:

26.0

Abstract:

An evaluation of the real-ear sound attenuation characteristics of the Navy SPH-3 Modified LS Helmet was done with procedures and equipment specified by ASA Z24.22 - 1957. The results show that the SPH-3 Modified LS is a relatively efficient attenuator of sound throughout the audio spectrum. In view of the poor sound attenuation characteristics of the Army APH-5, it has been recommended that this helmet be replaced by the SPH-3 Modified LS.

Descriptors:

• *HELMETS
• ACOUSTIC PROPERTIES
• ATTENUATION
• EAR PROTECTORS
• HEARING
• PROTECTION
• PSYCHOACOUSTICS
• SOUND

Subject Categories:

• Protective Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE