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SAE AIR1672 Revision B, June 1, 1983
Practical Methods to Obtain Free-Field Sound Pressure Levels from
Acoustical Measurements Over Ground Surfaces
Description / Abstract:
INTRODUCTION:
Acquisition of free-field data is of practical significance in the field of aeronautical acoustics. The need for free-field data includes (but is not restricted to) the following: (1) comparison of acoustical data obtained from the same engine under various measurement conditions, (2) com partisan of the results obtained form models with those form an engine on a test stand, (3) comparison of noise measurements made on the same engine under static and in-flight conditions, (4) design of test facilities, (5_ standardization of techniques for "in situ" acoustical measurements, (6) spectral decomposition to isolate the contribution of different sources to the total noise, and (7) prediction of aircraft noise on the basis of methods which, generally, provide free-field data
Acquisition of free-field data is of practical significance in the field of aeronautical acoustics. The need for free-field data includes (but is not restricted to) the following: (1) comparison of acoustical data obtained from the same engine under various measurement conditions, (2) com partisan of the results obtained form models with those form an engine on a test stand, (3) comparison of noise measurements made on the same engine under static and in-flight conditions, (4) design of test facilities, (5_ standardization of techniques for "in situ" acoustical measurements, (6) spectral decomposition to isolate the contribution of different sources to the total noise, and (7) prediction of aircraft noise on the basis of methods which, generally, provide free-field data
SAE AIR1672 Revision B, June 1, 1983
Practical Methods to Obtain Free-Field Sound Pressure Levels from
Acoustical Measurements Over Ground Surfaces