THE ASSESSMENT OF ENVIRONMENTAL NOISE - ISO 1996

It now seems doubtful if a 'general noise annoyance model', attempting to allow for all possible sources of noise variation, is feasible; this is because human auditory perception is selective, focusing on what is most important or interesting at the time. These selective attention mechanisms were first recognised in the authors' 'acoustic feature model', later developed as the basis for the current revision of the International Standard ISO 1996 "Description and measurement of environmental noise", adopted in the UK as British Standard BS 7445. This paper describes the new approach, and aims to stimulate suggestions and comments, to assess how far the UK acoustics community supports the new ideas. The three types of outcome that need to be considered are: (Class A) zero or negative noise impact, with no action required; (Class B) intermediate noise impact, where action is needed only to balance costs against benefits; and (Class C) unacceptable noise impact, where action is imperative whatever its cost. Examples of each are given. Comparisons of a new specific noise are of Type 1 if it is against existing specific noise, Type 2 if it is against existing residual or ambient noise, and Type 3 if it is against absolute criteria. Each type of comparison is discussed, and possible future developments are indicated. For the covering abstract, see IRRD E100715.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 19-25

Subject/Index Terms

Filing Info

  • Accession Number: 00764406
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 1-901656-09-8
  • Files: ITRD
  • Created Date: May 28 1999 12:00AM