Mitsubishi Electric City Multi PKFY-P06NAMU-E Technical & Service Manual page 15

4-3. NOISE CRITERION CURVES
PKFY-P06NAMU-E
PKFY-P08NAMU-E
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PKFY-P18NFMU-E
PKFY-P24NFMU-E
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
Unit
3.3ft
3.3ft
SPL(dB)
NOTCH LINE
High 36
Medium1 35
Medium2 33
Low 32
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
SPL(dB) LINE
NOTCH
High 45
Low 39
500 1000 2000 4000 8000
Wall
Ambient temperature 80°F
PKFY-P12NGMU-E
PKFY-P15NGMU-E
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125
PKFY-P30NFMU-E
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
NC-20
CONTINUOUS
NOISE
10
63 125
15
SPL(dB)
NOTCH
High
Medium1
Medium2
Low
250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
SPL(dB)
NOTCH
High 49
Low 46
250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
LINE
42
40
36
32
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
4000 8000
LINE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
4000 8000