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)

  • Corporate Authors:

    Naval Ocean Systems Center

    San Diego, CA  United States 
  • Authors:
    • Klumpp, R G
    • Schmidt, D R
  • Publication Date: 1978-7-3

Media Info

  • Pagination: 37 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00190669
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: NOSC/TR-247 Res Rpt.
  • Files: TRIS
  • Created Date: Mar 28 1979 12:00AM