Mitsubishi Electric CITY MULTI PFLY Series Technical & Service Manual page 19

3-4. NC CURVES
PLFY-M20VEM-(E/ET)
PLFY-M25VEM-(E/ET)
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
PLFY-M63VEM-(E/ET)
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
PLFY-M100VEM-(E/ET)
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
OCH728A
NOTCH SPL(dB) LINE
High 29
Medium1 27
Medium2 26
Low 24
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
NOTCH SPL(dB) LINE
High 32
Medium1 30
Medium2 29
Low 28
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
NOTCH SPL(dB) LINE
High 41
Medium1 39
Medium2 37
Low 34
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
PLFY-M32VEM-(E/ET)
PLFY-M40VEM-(E/ET)
PLFY-M50VEM-(E/ET)
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
PLFY-M80VEM-(E/ET)
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
PLFY-M125VEM-(E/ET)
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
19
NOTCH SPL(dB)
High 31
Medium1 29
Medium2 27
Low 26
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
NOTCH SPL(dB)
High 37
Medium1 34
Medium2 31
Low 28
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
NOTCH SPL(dB)
High 45
Medium1 42
Medium2 39
Low 35
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
LINE
LINE
LINE