Contents
CHAPTER 1
Introduction......................................................................................................... 1
1.1 About This Manual............................................................................................... 1
1.2 Reference Sound Source Type 4204................................................................... 1
CHAPTER 2
Operation............................................................................................................. 5
2.1 Connection of Mains Supply ................................................................................ 5
2.2 Sound Power Measurements............................................................................... 6
2.3 Sound Absorption Measurements...................................................................... 12
2.4 Sound Insulation Measurements ....................................................................... 13
CHAPTER 3
Characteristics.................................................................................................. 17
3.1 Frequency Characteristics ................................................................................. 17
3.2 Factory Calibration............................................................................................. 18
3.3 Directional Characteristics ................................................................................. 18
3.4 Influence of Rotational Speed............................................................................ 20
3.5 Acoustical Effect of Barometric Pressure........................................................... 22
3.6 Acoustical Effect of Ambient Temperature......................................................... 23
3.7 Field Calibration................................................................................................. 23
3.8 Influence of Reflecting Plane ............................................................................. 25
3.9 Influence of The Environment............................................................................ 25
3.10 Carrying Case WE-0268.................................................................................... 27
3.11 Service and Repair ............................................................................................ 27
CHAPTER 4
Specifications................................................................................................... 29
INDEX ................................................................................................................... 33
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