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E)
E:1
E:2
F)
F:1
F:2
G) Attenuation Values
MT20H682FB-*
1
Frequency (Hz)
2
Mean Attenuation (dB)
3
Standard Deviation (dB)
4
Assumed Protection Value (dB)
308 g
6)
MT20H682BB-*
1
Frequency (Hz)
2
Mean Attenuation (dB)
3
Standard Deviation (dB)
4
Assumed Protection Value (dB)
308 g
6)
H) External input level
Input (mV)
SPL (dB(A))
1
49.6
70.4
88.3
75.4
156.8
80.4
279.2
85.4
496.1
90.3
I) Criterion levels
H
116 dB(A)
M
105 dB(A)
L
94 dB(A)
E:3
F:3
125
250
500
11.5
17.9
27.8
2.5
2.7
1.8
9.0
15.3
25.9
5
SNR=28 dB H=31 dB M=25 dB L=16 dB
125
250
500
16.6
16.8
27.4
1.8
2.3
2.2
14.8
14.5
25.2
5
SNR=28 dB H=31 dB M=25 dB L=18 dB
Standard
2
deviation(dB)
1.0
1.0
1.0
1.0
1.0
F:4
F:5
1000
2000
4000
30.0
32.1
36.2
2.3
3.0
2.0
27.7
29.1
34.2
1000
2000
4000
32.1
33.1
33.0
2.1
3.2
2.9
30.0
29.9
30.1
The electrical input level for which
the sound pressure level is equal to
82 dB(A) :
167 mV
4
8000
40.3
3.1
37.2
8000
36.1
3.2
32.9
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