Accession Number:

AD0739870

Title:

Measurement and Analysis of Noise from Four Aircraft in Level Flight (727, KC-135, 707-320B and DC-9).

Descriptive Note:

Final rept. May-Sep 71,

Corporate Author:

HYDROSPACE RESEARCH CORP SAN DIEGO CALIF SAN DIEGO DIV

Personal Author(s):

Report Date:

1971-09-01

Pagination or Media Count:

60.0

Abstract:

Measurements of noise from aircraft level flyovers are presented in the form of effective perceived noise level EPNL as a function of slant range at the closest point of approach. Four aircraft were investigated 727, KC-135, 707-320B, and DC-9 and the effort involved acquisition of acoustical, meteorological, aircraft tracking, and aircraft operational data. Microphones were located four feet above the ground in an array normal to the flight track. Author

Subject Categories:

  • Civilian Aircraft
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE