0
10
20
30
40
50
60
70
80
63 125 250 500 1,000 2,000 4,000 8,000
NC-20
NC-40
NC-50
NC-60
NC-30
NC-15
NC-25
NC-35
NC-45
NC-55
NC-65
High
Quiet
0
10
20
30
40
50
60
70
80
63 125 250 500 1,000 2,000 4,000 8,000
NC-20
NC-40
NC-50
NC-60
NC-30
NC-15
NC-25
NC-35
NC-45
NC-55
NC-65
HIGH
QUIET
0
10
20
30
40
50
60
70
80
63 125 250 500 1,000 2,000 4,000 8,000
NC-20
NC-40
NC-50
NC-60
NC-30
NC-15
NC-25
NC-35
NC-45
NC-55
NC-65
High
Quiet
0
10
20
30
40
50
60
70
80
63 125 250 500 1,000 2,000 4,000 8,000
NC-20
NC-40
NC-50
NC-60
NC-30
NC-15
NC-25
NC-35
NC-45
NC-55
NC-65
HIGH
QUIET
Octave band sound pressure level, dB:(0dB=0.0002µbar)
Octave band center frequency, Hz
Octave band sound pressure level, dB:(0dB=0.0002µbar)
Octave band center frequency, Hz
Octave band sound pressure level, dB:(0dB=0.0002µbar)
Octave band center frequency, Hz
Octave band sound pressure level, dB:(0dB=0.0002µbar)
Octave band center frequency, Hz