Noise Criterion Curves - Mitsubishi PCA-RP71HAQ Service Manual

5

NOISE CRITERION CURVES

PCA-RP71HAQ
PCA-RP71HAQ-ER
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
1m
1m
about 1.4m
MICROPHONE
OCH492A
NOTCH SPL(dB) LINE
High 38
Low 34
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
unit
11
PCA-RP125HAQ
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
ceiling
NOTCH
SPL(dB) LINE
High 50
Low 44
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000