Noise Criterion Curves - Mitsubishi Electric PLA-SP71BA.UK Service Manual

5

NOISE CRITERION CURVES

PLA-SP71BA.UK
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
PLA-SP125BA.UK
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
CEILING
MICROPHONE
OCH565
NOTCH SPL(dB) LINE
High 34
Medium1 32
Medium2 30
Low 28
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
NOTCH SPL(dB) LINE
High 41
Medium1 39
Medium2 36
Low 34
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
UNIT
1.5m
PLA-SP100BA.UK
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PLA-SP140BA.UK
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
13
NOTCH SPL(dB) LINE
High 40
Medium1 37
Medium2 34
Low 32
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
NOTCH SPL(dB) LINE
High 44
Medium1 42
Medium2 39
Low 36
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000