COMPARISONS BETWEEN SUBJECTIVE RATINGS OF AIRCRAFT NOISE AND VARIOUS OBJECTIVE MEASURES.
STANFORD RESEARCH INST MENLO PARK CALIF SENSORY SCIENCES RESEARCH CENTER
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Various established and proposed objective methods of measuring aircraft noise were evaluated with respect to their ability to predict subjective ratings of the acceptability of noise produced by present-day commercial aircraft. Recorded flyovers of several types of aircraft during takeoff and landing operations were selected, and other flyovers were electronically simulated. Paired-comparison listening tests were used to determine the level at which each flyover was considered to be as acceptable as a reference sound. Objective measures corresponding to this level were computed for each flyover. The relative accuracy with which the objective measures predicted the subjective ratings was expressed in terms of the variance in the computed values of each objective measure. The smallest variance was associated with a measure that takes into account the spectral properties of a given flyover for its entire duration and also the presence of pure tones or other narrow-band energy concentrations. Author