Accession Number : AD0729067

Title :   Noise Levels on Aircraft-Carrier Flight Decks, and Their Effects

Descriptive Note : Research and development rept. 1 Jul-31 Dec 1970

Corporate Author : NAVAL ELECTRONICS LAB CENTER SAN DIEGO CA

Personal Author(s) : Webster, J. C.

PDF Url : AD0729067

Report Date : 30 APR 1971

Pagination or Media Count : 47

Abstract : Measurements were made of noise levels produced by four aircraft during pilot qualification exercises aboard the flight deck of USS KITTY HAWK. These measurements, on both the A- and C- frequency weighting networks, were augmented by calculations of speech-interference levels made later from tape recordings. These data were compared to similar measurements made at the Naval Air Test Center at Patuxent River, Md., and interpreted in terms of deafness risk and interference with speech communications. The levels measured on the carrier showed large amounts of low-frequency energy (at octaves centered at 62 and 125 Hz) not present in the data taken ashore; this variation is ascribed to the presence of blast deflectors on the carrier and to the effects of strong wind across the deck and the measuring microphone in its wind-screen. The noise levels measured are shown to severely degrade speech communications and to present a risk of deafness to personnel.

Descriptors :   *HEARING, *FLIGHT DECKS, *AVIATION MEDICINE, HAZARDS, INTENSITY, INTERFERENCE, JET FIGHTERS, AIRCRAFT CARRIERS, SPEECH, AUDITORY PERCEPTION.

Subject Categories : Stress Physiology
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE