Noise Criterion Curves - Mitsubishi Electric Mr. Slim PCA Series Service Manual

5

NOISE CRITERION CURVES

PCA-RP71HAQ
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
1m
1m
about 1.4m
MICROPHONE
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
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
10
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