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61
Sound Level
Sound Pressure Level
Model
Speed
1/1 Octave A-weighted Sound Pressure Level (dB, ref 20µPa) Overall
(dBA)
Noise
Criteria
125Hz
250Hz
500Hz
1kHz
2kHz
4kHz
8kHz
FTV50A
High
44
41
38
37
34
28
18
42
36
Med
40
39
35
34
30
23
14
38
33
Low
37
36
32
30
26
19
13
35
29
Quiet
35
33
30
28
23
16
12
33
26
NC Curve
0
10
20
30
40
50
60
70
80
90
63
125
250
500
1k
2k
4k
8K
NC-40
NC-50
NC-60
NC-30
NC-20
NC-70
NC-40
NC-50
NC-60
NC-30
NC-20
NC-70
NC-40
NC-50
NC-60
NC-30
NC-20
NC-70
APPROXIMATE
THRESHOLD HEARING FOR
CONTINUOUS NOISE
QUIET (Q)
LOW (L)
MEDIUM (M)
HIGH (H)
OCTAVE BAND CENTER FREQUENCY (Hz)
3D122801
Summary of Contents for FTV-A Series
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Page 68: ...66 Sound Level FTV85PS...