Filter
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III
101
✻✻
052
✻✻
Sound pressure level (dB, ref.2xE-5)
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
63 125 250 500 1000 40002000 8000
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
Octave band center freqency(Hz)
High
Low
(8) Ceiling type
✻✻
070/072
✻✻
Sound pressure level (dB, ref.2xE-5)
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
63 125 250 500 1000 40002000 8000
NC-65
NC-60
NC-55
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
NC-15
Octave band center freqency(Hz)
High
Low
DVM E-D/B(chapter3-3)-E<03759 3/21/02 7:38 PM Page 101