DIN 45645-2:1997-07

1 Purpose and field of application
2 Other relevant Standards
3 Measuring variables and terms
4 Requirements relating to sound measuring instruments
      4.1 Sound level meters
      4.2 Calibration
      4.3 Auxiliary equipment
5 Recommendations concerning noise measurement and
      evaluation
      5.1 General
      5.2 Measuring point
      5.3 Measurement time, partial time, characteristic
             noise immission, random sample
      5.4 Extraneous noises
6 Determination of the rating level
      6.1 Rating level at the place of work
      6.2 Quantity to be measured
      6.3 Averaged level
      6.4 Calculation of extra allowances
             6.4.1 Impulse allowance
             6.4.2 Tone allowance
      6.5 Evaluation time
      6.6 Calculation of the rating level
7 Use of the accuracy classes when comparing with limit
      values
8 Measurement report
Appendix A - Examples
Appendix B - Simplified averaging method for the accuracy
             Class 3
Appendix C - Random sampling method for the determination of
             the averaged level

In conjunction with DIN 45645 Part 1, establishes prerequisites for standardized determination of the rating level for noise immissions at places of work. These noise immissions are consequently comparable with one another, irrespective of the nature and generation of the noises.