DIN EN 60034-9 : 2008 COR 1 2008

Introduction
1 Scope and object
2 Normative references
3 Terms and definitions
4 Test nomenclature
5 Test conditions
   5.1 Machine mounting
   5.2 Test operating conditions
6 Sound power level limits
7 Declaration and verification of noise emission values
Tables
1 Maximum A-weighted sound power level LWA in dB, at
  no-load (excluding motors according to table 2) (Method
  of cooling, IC code, see IEC 60034-6) (Degree of
  protection, IP code, see IEC 60034-5)
2 Maximum A-weighted sound power level, LWA in dB at no-load
  (for single-speed three-phase cage induction motors
  IC01, IC11, IC21, IC411, IC511 and IC611)
3 Incremental expected increase, over no-load condition, in
  A-weighted sound power levels in dB, (for rated load
  condition for motors according to table 2)

Specifies maximum permissible A-weighted sound power levels for rotating electrical machines. Coverage includes terms and conditions; methods of measurement; test conditions.