Noise Criterion Curves - Mitsubishi Electric PUZ-A NHA Series Service Manual

6

NOISE CRITERION CURVES

PLA-A12AA
PLA-A12AA
1
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PLA-A36AA
PLA-A42AA
PLA-A36AA
1
PLA-A42AA
1
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
NOTCH SPL(dB) LINE
High 31
Medium1 29
Medium2 28
Low 27
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
NOTCH SPL(dB) LINE
High 41
Medium1
39
Medium2
36
Low 33
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
PLA-A18AA PLA-A18AA
PLA-A24AA PLA-A24AA
PLA-A30AA PLA-A30AA
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
CEILING
MICROPHONE
10
NOTCH SPL(dB) LINE
1
High
34
1
Medium1 32
Medium2
1 30
Low 28
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
UNIT
5 ft