B 21
B F6C.GB 21-22 0504
6 EN standards
6.1 Continuous sound pressure level
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The operator always must use ear protection. The immission value at the driver’s ears
may fluctuate severely depending on the materials used for paving, and may exceed
85 dB (A). If no ear protection devices are used, hearing can be impaired.
The sound emission level of the finisher has been measured under free-field condi-
tions according to the draft of ENV 500-6, dated March 1997, and ISO 4872.
Sound pressure level in the driver’s seat (at head height): L
AF
= 85,0dB(A)
Sound output level: L
WA
= 103,5 dB(A)
Sound pressure level at the machine
6.2 Operating conditions during measurement
The diesel engine was running at maximum speed. The screed was fixed in the trans-
portation position. Conveyors, augers, tampers and vibration were running at least at
50% of the maximum speed.
6.3 Measuring point configuration
Hemispherical measuring surface with a radius of 10 m. The machine was at the cen-
tre. The measuring points had been assigned the following coordinates:
Measuring point 24681012
Sound pressure level L
AFeq
(dB(A))
74,5 73,1 73,0 74,0 75,2 76,1
Measuring points 2, 4, 6, 8 Measuring points 10, 12
Coordinates X Y Z X Y Z
±11.2 ±11.2 1.5
- 4.32
+4.32
+10.4
-10.4
11.36
11.36
SCHALL.TIF
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