Accession Number : AD1040892


Title :   Speech Intelligibility of Aircrew Mask Communication Configurations in High-Noise Environments


Descriptive Note : Technical Report,01 Dec 2015,31 Jan 2016


Corporate Author : US Army Research Laboratory Aberdeen Proving Ground United States


Personal Author(s) : Pollard,Kimberly A ; Garrett,Lamar


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1040892.pdf


Report Date : 28 Sep 2017


Pagination or Media Count : 34


Abstract : Three communication-system configurations were evaluated for speech intelligibility (SI) when used with the Joint Service Aircrew Mask for Strategic Aircraft and the Intercommunication Unit in high (85 and 95 dBA) background noise. Each communication system was used with foam earplugs or additional over-the-ear hearing protection and worn in combination with the protective hood. The goal of this evaluation was to compare communication-system configurations at high noise levels and to determine if the MIL-STD-1472G specifications for minimally acceptable speech intelligibility were being met (SI score 75 ). The average SI scores for one system exceeded the minimally acceptable requirement, with average scores of 96 and 93 in 85 dBA and 95 dBA, respectively. Results are discussed and recommendations are provided.


Descriptors :   INTELLIGIBILITY , speech , PROTECTIVE MASKS , test and evaluation , standards , communication systems , background noise , hearing protection


Subject Categories : Voice Communications
      Protective Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE