Quartz CWM 105, Техническое руководство

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-4-
AIR THROWS
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HYDRAULIC RESISTANCES
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SOUND POWER and SOUND PRESSURE LEVELS
973 SERIES CWM (L) ( speed 1 = lowest, 3 = highest)
SOUND POWER LEVELS
SOUND PRESSURE LEVELS Frequency Hz
MODEL SPEED 125 250 500 1K 2K 4K dBA dBA NC
55
MIN 36.8 37 39.1 38.8 34.4 31.7 43 25 19
MED 41 43.4 45.8 45.1 39.6 35.4 49 31 25
MAX 46.7 48.6 50.6 50.4 46.6 39 54 37 31
75
MIN 39.1 44.3 47.2 46.8 41.6 40.8 51 33 27
MED 43.8 49.1 51.3 51.3 46.7 39.5 55 37 32
MAX 45.5 50.5 53.7 52.9 48.7 40.8 57 39 34
105
MIN 34.1 38 44 42.3 41 38 48 30 24
MED 42.7 45.8 48.9 49.1 44.2 38.1 53 35 30
MAX 46.4 51.6 54.2 54.2 49.9 42.9 57 40 35
Sound Power Levels obtained in conformance with BS 4196: Part 5: 1981. Values are shown in dB with a standard
reference of 1 pW.
Sound Pressure Levels are dB relative to 2 x 10
-5
N/m
2
and are calculated from results measured in anechoic conditions.
Values relate to a position of 3m away from the centre line of the unit, 1m down.