Mitsubishi Electric Mr. Slim PM SERIES, Manual

Page: 18 / 30

A-298
NOISE CRITERION CUR
VES
CEILING CASSETTE PM
PMH-P1.6BA PMH-P2BA
CEILING CASSETTE PM SERIES PMH-P1/P1.6/P2BA
A.6.8 NOISE CRITERION CURVES
UNIT
1.5m
MICROPHON
CEILING
Ambient temperature 27 :
Test conditions are based on JIS Z8731
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE THRESHOLD OF
HEARING FOR CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCT
A
VE B
AND SOUND PRESSURE LEVEL,
dB re 0.002 MICR
O B
A
R
BAND CENTER FREQUENCIES, Hz
Hi
NOTCH
Mi1
Mi2
Lo
35
SPL(dB)
33
31
29
LINE
PMH-P1BA
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCT
A
VE B
AND SOUND PRESSURE LEVEL,
dB re 0.002 MICR
O B
A
R
BAND CENTER FREQUENCIES, Hz
Hi
NOTCH
Mi1
Mi2
Lo
40
SPL(dB)
38
36
34
LINE
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCT
A
VE B
AND SOUND PRESSURE LEVEL,
dB re 0.002 MICR
O B
A
R
BAND CENTER FREQUENCIES, Hz
Hi
NOTCH
Mi1
Mi2
Lo
42
SPL(dB)
40
38
36
LINE