ReportDOI
Subjective Ratings of Annoyance Produced by Rotary-Wing Aircraft Noise
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In this paper, subjective ratings of annoyance caused by helicopter noise relative to that caused by fixed-wing aircraft were obtained and a comparison of the subjective ratings with various physical predictors of annoyance indicated that the integrated A-weighted level (dBA) predicted as well as any of the predictors with the D2 weighted level and EPNL almost equivalent.Abstract:
: Subjective ratings of annoyance caused by helicopter noise relative to that caused by fixed-wing aircraft were obtained. Comparison of the subjective ratings with various physical predictors of annoyance indicated that the integrated A-weighted level (dBA) predicted as well as any of the predictors with the D2-weighted level and EPNL almost equivalent. The B-weighted level and C-weighted level did not predict as well. No correction factor for the impulsive character (blade slap) of the helicopter noise was required. No substantial penalty for helicopters compared to fixed-wing aircraft noise was required. (Author)read more
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Journal ArticleDOI
A modified PNdB for assessment of low frequency noise
N. Broner,H. G. Leventhall +1 more
TL;DR: In this article, the use of the perceived noise level (PNL) in PNdB was investigated and it was found that the PNL extended to include lower frequencies down to the 25 Hz 1 3 octave band was superior to the standard PNL.
Journal ArticleDOI
Effects of aircraft noise on an intelligibility task.
TL;DR: The results were in close agreement with previous field studies on the rated "annoyingness" of aircraft sounds and provided no support for the contention that impulsive helicopter noise ("blade-slap") is disruptive in ways not accoullfed for by simple measures of loudness level.
A Comprehensive Bibliography of Literature on Helicopter Noise Technology
TL;DR: This bibliography, covering the period 1975 through calendar 1980, also provides, abstracts on literature that appear to make a significant contribution to the field of helicopter noise technology.
Should helicopter noise be measured differently from other aircraft noise? A review of the psychoacoustic literature
TL;DR: A review of 34 studies indicates that several factors or variables might be important in providing a psychoacoustic foundation for measurements of the noise from helicopters as discussed by the authors, including phase relations, tail rotor noise, repetition rate, crest level, and generic differences between conventional aircraft and helicopters.
Effects of repetition rate and impulsiveness of simulated helicopter rotor noise on annoyance
C. A. Powell,D. A. Mccurdy +1 more
TL;DR: In this paper, the effects of helicopter impulsive rotor noise were investigated to investigate effects of repetition rate and impulsiveness on the annoyance of computer generated stimuli, and the effect of impulsiveness was not generally improved by any of several proposed impulsiveness corrections.