ΙΙΙ
87
✻✻
020
✻✻
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 frequency(Hz)
High
Low
✻✻
026/032
✻✻
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 frequency(Hz)
High
Low
8-2. Octave band level
(1) 1-way cassette type
DVM TM(chapter3-3)_E<03759 6/14/02 2:59 PM Page 87