Accession Number : ADA301779

Title :   Develoment of Noisecheck Technology for Measuring Aircraft Noise Exposure.

Descriptive Note : Final rept.,

Corporate Author : BOLT BERANEK AND NEWMAN INC CANOGA PARK CA

Personal Author(s) : Rentz, Peter E. ; Seidman, Harry

PDF Url : ADA301779

Report Date : MAY 1980

Pagination or Media Count : 140

Abstract : This report describes a program to develop instrumentation for use by Air Force personnel to make spot checks of the noise exposure at locations in and about air bases. These instruments combined bined with standardized field measurement procedures form a technology, termed NOISECHECK, which provides a means for measuring the noise environment and checking daily average noise level values (DNL's) calculated by the Air Force NOISENAP community- aircraft noise prediction program. After analysis of measurement requirements and a survey of available equipment, four prototype portable noise level monitoring systems were acquired. The principle components were an electret type microphone and a microprocessor based noise level monitor unit with alpha-numeric printout suitable for use by minimally trained personnel. The systems were utilized in a field measurement demonstration test conducted at Barksdale AFB in June 1978. In this three-week field program, aircraft noise levels and operational data were acquired and analyzed in detail to develop and evaluate NOISECHECK procedures for test planning, test conduct, and data analysis. The data analysis included determination of yearly average DNL values by several methods of varying complexity and assessment of statistical confidence intervals for the different methods.

Descriptors :   *ACOUSTIC MEASUREMENT, *AIRPORTS, *AIRCRAFT NOISE, DATA PROCESSING, PORTABLE EQUIPMENT, PREAMPLIFIERS, HAZARDS, EXPOSURE(GENERAL), MONITORING, FIELD TESTS, INPUT OUTPUT PROCESSING, PROTOTYPES, AIR FORCE PERSONNEL, LANDING FIELDS, AIR FORCE FACILITIES, CALIBRATION, ACOUSTIC EQUIPMENT, MICROPHONES, ACOUSTIC DATA, SOUND PRESSURE, NOISE POLLUTION, FREQUENCY RESPONSE, ACOUSTIC IMPEDANCE, CONFIDENCE LIMITS, ELECTRETS.

Subject Categories : Terminal Flight Facilities
      Acoustics
      Noise Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE