ONORM EN ISO 3740 : 2001

CONTENTS
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Determination and declaration of sound
     power levels
4.1 Reasons for the determination of sound power levels
4.2 Methodology
5 Noise declaration according to ISO 4871
6 Selection of the appropriate International standard
     for determination of sound power levels
6.1 Quantities to be measured and determined
6.2 Considerations affecting choice of method
6.3 Synopsis
6.4 Test environments
6.5 Measurement uncertainty
6.6 Procedure for selection
Annex A (normative) Synopsis of basic International
  Standards on sound power level determinations
Annex B (informative) Acoustical test environments
Annex C (informative) Factors affecting the choice
  of measurement method
Annex D (informative) Guidance on the choice of
  appropriate International Standard for determining
  the sound power level of a sound source
Bibliography

Specifies the use of a series of nine International Standards those describing various methods for determining the sound power levels from all types of machinery and equipment. It provides: - brief summaries of these basic International Standards - guidance on the selection of one or more of these standards which are appropriate to any particular type. the guidance given a plies only to airbone sound. It is for use in the preparation of noise test codes and also in noise testing where no specific noise test code exist.