Annoyance of Helicopter Bladeslap.
Abstract
To determine the possible underassessment of annoyance by A-weighted measurements, 28 subjects rated the annoyance of helicopter sounds by a magnitude estimation method. The sounds were recorded in a residential community and included samples ranging from no bladeslap to heavy bladeslap. The degree of underassessment of annoyance by an average A-weighted measure was found to be 2 dB. This underassessment was found over the level range of 60 to 85 dB(A) for two different listener groups, for bladeslap classification by listeners or by crest factor measurement, and for simulated inside listening. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 03, 1978
- Accession Number
- ADA060755
Entities
People
- D. R. Schmidt
- R. G. Klumpp