Noise Criterion Curves - Mitsubishi Electric PCA-A24KA4 Service Manual

5

NOISE CRITERION CURVES

PCA-A24KA4
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
PCA-A36KA4
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250 500
BAND CENTER FREQUENCIES, Hz
3.3ft
MICROPHONE
NOTCH SPL(dB) LINE
High 40
Medium1 37
Medium2 35
Low 33
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
NOTCH SPL(dB) LINE
High 43
Medium1 41
Medium2 39
Low 37
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000 2000 4000 8000
3.3ft
about 4.62ft
PCA-A30KA4
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PCA-A42KA4
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
ceiling
unit
9
NOTCH SPL(dB) LINE
High 41
Medium1 39
Medium2 37
Low 35
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
NOTCH SPL(dB) LINE
High 45
Medium1 43
Medium2 41
Low 39
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000