Mitsubishi city multi PKFY-08NAMU-A Technical & Service Manual page 18

4-3. Noise criterion curves
PKFY-08NAMU-A
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PKFY-20NFMU-A
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
Hi 36
Med1 35
Med2 33
Lo 32
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
NOTCH SPL(dB) LINE
Hi 45
Lo 39
500 1000 2000 4000 8000
Wall
Ambient temperature 80˚F
Test conditions are based on JIS Z8731
PKFY-12NGMU-A
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125
PKFY-32NFMU-A
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
OC292-16
SPL(dB)
NOTCH
Hi
Med1
Med2
Lo
250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
SPL(dB)
NOTCH
Hi 49
Lo 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