7
UNIT
5ft
MICROPHONE
CEILING
Ambient temperature 80˚F
90
80
70
60
50
40
30
20
10
63
125
250
500
1000
2000
4000
8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PLFY-P36NAMU-E
High
Medium1
Medium2
Low
NOTCH
44
43
40
37
SPL(dB)
LINE
90
80
70
60
50
40
30
20
10
63
125
250
500
1000
2000
4000
8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
PLFY-P30NAMU-E
High
Medium1
Medium2
Low
NOTCH
41
40
36
34
SPL(dB)
LINE
OC340A--1.qxp 06.7.25 0:39 PM Page 7
