SN EN ISO 140-12 : 2000

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Measuring equipment
5 Test arrangement
      5.1 Requirements for the laboratory
             5.1.1 Construction of the test facility
             5.1.2 Dimensions of the test facility
             5.1.3 Dividing wall
             5.1.4 Access floor height
             5.1.5 Plenum lining
      5.2 Installation of access floor
6 Test procedure and evaluation
      6.1 Generation of sound field in the source room
             6.1.1 Airborne noise
             6.1.2 Impact sound pressure level
      6.2 Measurement of the average sound pressure level
             6.2.1 General
             6.2.2 Microphone positions
             6.2.3 Averaging time
      6.3 Frequency range of measurements
      6.4 Measurement of reverberation time and evaluation
             of the equivalent sound absorption area
      6.5 Correction for background noise
      6.6 Maximum value of normalized flanking level
             difference
7 Precision
8 Expression of results
9 Test report