DIN 45635-32:1980-05

1 Scope and field of application
2 Other standards to be observed
3 Concepts, quantities
4 Instrumentation
5 Test conditions
      5.1 Object to be tested
      5.2 Operating condition of the machine
      5.3 Installation of the machine
      5.4 Measurement surface, measurement distance,
             location and number of measuring points
             5.4.1 Measurement surface
             5.4.2 Measurement distance
             5.4.3 Location and number of measuring points
             5.4.4 Measuring points at workplace
      5.5 Test room
             5.5.1 Estimation of the equivalent sound
                      absorption area A
             5.5.2 Experimental determination of the
                      equivalent sound absorption area A
             5.5.3 Estimation of the equivalent sound
                      absorption area A in low ceiling rooms
6 Test procedure
      6.1 Measurement of the A-weighted sound pressure level
      6.2 Measurement of the sound pressure spectrum
      6.3 Measurement of the background noise level
      6.4 Determination of the area of measurement surface
             S and of the measurement surface ratio Ls
7 Evaluation
      7.1 Calculation of the measurement surface sound
             pressure level Lndition
             7.1.1 Time averaging
             7.1.2 Taking the background noise into
                      consideration
             7.1.3 Space averaging
             7.1.4 Taking the influence of the room into
                      consideration
      7.2 Calculation of the A-weighted sound power level
             Lwa
8 Uncertainty of measurement
      8.1 Uncertainty of sound measurement
      8.2 Uncertainty relating to the determination of the
             operating condition
      8.3 Overall uncertainty
9 Test report
10 Advice on the use of the test results
      10.1 Acoustical characteristics
      10.2 Correlation of the acoustical characteristics
Appendices: Complementary specifications for individual types
             of machines (with synopsis of contents)