I.S. CEN TS 1793-5:2003

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Reflection index measurements
  4.1 General principle
  4.2 Measured quantity
  4.3 Measuring equipment
      4.3.1 Components of the measuring system
      4.3.2 Sound source
      4.3.3 Test signal
  4.4 Data processing
      4.4.1 Calibration
      4.4.2 Sample rate
      4.4.3 Background noise
      4.4.4 Signal subtraction technique
      4.4.5 Adrienne temporal window
      4.4.6 Placement of the Adrienne temporal window
      4.4.7 Low frequency limit and sample size
  4.5 Positioning of the measuring equipment
      4.5.1 Maximum sampled area
      4.5.2 Selection of the measurement positions
            4.5.2.1 Flat homogeneous samples
            4.5.2.2 Non flat or non homogeneous samples
                    in one direction
            4.5.2.3 Non flat or non homogeneous samples
                    in two directions
      4.5.3 Reflecting objects
      4.5.4 Safety considerations
  4.6 Sample surface and meteorological conditions
      4.6.1 Condition of the sample surface
      4.6.2 Wind
      4.6.3 Air temperature
  4.7 Single-number rating of sound reflection DL[RI]
  4.8 Measuring procedure
  4.9 Test report
5 Sound insulation index measurements
  5.1 General principle
  5.2 Measured quantity
  5.3 Measuring equipment
      5.3.1 Components of the measuring system
      5.3.2 Sound source
      5.3.3 Test signal
  5.4 Data processing
      5.4.1 Calibration
      5.4.2 Sample rate
      5.4.3 Background noise
      5.4.4 Scanning technique
      5.4.5 Adrienne temporal window
      5.4.6 Placement of the temporal window
      5.4.7 Low frequency limit and sample size
  5.5 Positioning of the measuring equipment
      5.5.1 Selection of the measurement positions
      5.5.2 Post measurements
      5.5.3 Additional measurements
      5.5.4 Reflecting objects
      5.5.5 Safety considerations
  5.6 Sample surface and meteorological conditions
      5.6.1 Condition of the sample surface
      5.6.2 Wind
      5.6.3 Air temperature
  5.7 Single-number rating of airborne sound insulation
      DL[SI]
      5.7.1 Elements
      5.7.2 Posts
  5.8 Measuring procedure
  5.9 Test report
Annex A (informative) Definition and usage of the MLS
        signal
  A.1 The MLS test signal
  A.2 Recovering of the overall impulse response
  A.3 Sample rate and MLS time length
  A.4 Improvement of the signal-to-noise ratio
Bibliography

Defines a test method for measuring two quantities representative of the intrinsic characteristics of traffic noise reducing devices: the reflection index for sound reflection and the sound insulation index for airborne sound insulation.