Mitsubishi Electric EHST20C-VM6HB Service Manual page 14

6-3. NOISE CRITERION CURVES
MICROPHONE
1m
1.5m
PUHZ-SW100VHA(-BS).UK
PUHZ-SW100VHAR3(-BS).UK
PUHZ-SW100VHAR4(-BS).UK
PUHZ-SW100YHA(-BS).UK
PUHZ-SW100YHAR1(-BS).UK
PUHZ-SW100YHAR3(-BS).UK
PUHZ-SW100YHAR4(-BS).UK
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
OCH533D
UNIT
GROUND
SPL(dB)
MODE LINE
COOLING 50
HEATING 54
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
PUHZ-SW75VHA(-BS).UK
PUHZ-SW75VHAR3(-BS).UK
PUHZ-SW75VHAR4(-BS).UK
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PUHZ-SW120VHA(-BS).UK
PUHZ-SW120VHAR3(-BS).UK
PUHZ-SW120VHAR4(-BS).UK
PUHZ-SW120YHA(-BS).UK
PUHZ-SW120YHAR1(-BS).UK
PUHZ-SW120YHAR3(-BS).UK
PUHZ-SW120YHAR4(-BS).UK
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
14
SPL(dB)
MODE LINE
COOLING
48
HEATING 51
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
SPL(dB)
MODE LINE
COOLING 51
HEATING 54
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000