I.S. CEN TS 1793-4:2004
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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ROAD TRAFFIC NOISE REDUCING DEVICES - TEST METHOD FOR DETERMINING THE ACOUSTIC PERFORMANCE - PART 4: INTRINSIC CHARACTERISTICS - IN SITU VALUES OF SOUND DIFFRACTION
Hardcopy , PDF
06-04-2015
English
01-01-2004
Important note : Users cannot be edited or removed once added to your Multi user PDF.
Foreword
Introduction
1 Scope
2 Normative references
3 Definition and symbols
3.1 Definitions
3.2 Symbols
4 Diffraction index difference measurements
4.1 General principle
4.2 Dimensions and specifications
4.3 Positions of the sound source
4.4 Position of the microphones
4.5 Free-field measurements
4.6 Measured quantity
4.7 Measurement equipment
4.8 Data processing
4.9 Positioning of the measuring equipment
4.10 Diffraction index difference
4.11 Single-number rating of diffraction index
difference DL[delta][DI]
4.12 Sample surface and meteorological conditions
4.13 Measuring procedure
4.14 Test report
Annex A (Informative) Definition and usage of the MLS
signal
Annex B (Informative) Indoor measurements for product
qualification
Annex C (Informative) Bibliography
Describes a test method for determining the intrinsic characteristics of sound diffraction of added devices installed on the top of traffic noise reducing devices.
| DocumentType |
Standard
|
| Pages |
31
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| CEN/TS 1793-4:2003 | Identical |
| ISO 13472-1:2002 | Acoustics Measurement of sound absorption properties of road surfaces in situ Part 1: Extended surface method |
| EN 1793-3:1997 | Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 3: Normalized traffic noise spectrum |
| EN 60651:1994/A2:2001 | SOUND LEVEL METERS (IEC 60651:1979/A2:2000) |
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