Noise Criterion Curves - Mitsubishi Electric PSA Series Service Manual

5

NOISE CRITERION CURVES

PSA-M71KA(-ER/-ET)
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PSA-M140KA(-ER/-ET)
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
OCH724
SPL(dB) LINE
NOTCH
44
High
Middle 42
40
Low
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
SPL(dB) LINE
NOTCH
51
High
49
Middle
Low 45
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
PSA-M100KA(-ER/-ET)
PSA-M125KA(-ER/-ET)
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
MICROPHONE
1 m
1 m
12
SPL(dB) LINE
NOTCH
51
High
49
Middle
Low 45
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
Main unit
floor