Accession Number:

AD0648503

Title:

NOISINESS JUDGMENTS OF HELICOPTER FLYOVERS

Descriptive Note:

Technical rept.

Corporate Author:

BOLT BERANEK AND NEWMAN INC VAN NUYS CA

Personal Author(s):

Report Date:

1965-01-01

Pagination or Media Count:

37.0

Abstract:

Judgment tests were conducted in which 21 college students judged the noisiness or unwantedness of eight recorded helicopter flyover noises vs a jet transport flyover noise and a shaped band of noise. Tests were conducted in an anechoic chamber using mainly the method of paired comparisons. These judgment tests indicate that the calculated perceived noise level is the best predictor of noisiness, followed closely by the N-weighted sound pressure level and the A- weighted sound pressure level, and finally, the overall sound pressure level. Duration and pure-tone corrections applied to the calculated perceived noise level did not improve the prediction accuracy of this measure.

Subject Categories:

  • Anatomy and Physiology
  • Medicine and Medical Research
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE