MT73H7F4D10NA-50
B:1 Test Frequency (Hz)
B:2 Mean attenuation (dB)
B:3 Standard deviation (dB)
MT73H7B4D10NA, MT73H7B4D10NA-50
B:1 Test Frequency (Hz)
B:2 Mean attenuation (dB)
B:3 Standard deviation (dB)
MT73H7P3E4D10NA, MT73H7P3E4D10NA-50
B:1 Test Frequency (Hz)
B:2 Mean attenuation (dB)
B:3 Standard deviation (dB)
B:4 Tested with 3M™ PELTOR™ Helmet Model H-700.
(C) COMPATIBLE INDUSTRIAL SAFETY HELMETS EN 352-3
C:1 Helmet Manufacturer
3M
3M
3M
3M
3M
3M
3M
Grolls
Petzl
Protector / Scott
Protector / Scott
(D) EXTERNAL AUDIO INPUT LEVELS EN 352-6
D:1 RMS
D:2 Mean Sound
Voltage U (mV)
Pressure (dB(A))
28,1
49,9
88,8
157,9
D:4 94 mV = 82 dB(A)
(E) FACTORY PROGRAMMED RADIO FREQUENCIES (*NA Models)
Channel
Frequency
Type
(MHz)
1
462.5625
FRS
2
462.5875
FRS
3
462.6125
FRS
4
462.6375
FRS
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125
250
500
1000
21.2
23.7
34.3
36.6
3.3
2.7
2.4
125
250
500
1000
20.9
23.6
33.8
37.3
3.1
2.0
2.2
125
250
500
1000
19.0
21.9
30.4
35.9
2.1
2.4
3.1
C:2 Helmet model
SecureFit Safety Helmet X5000
SecureFit Safety Helmet X5500
G3000 Basic set
G2000
G3501
H-700
Balance AC
Vertex
Style 600
Tuffmaster II
D:3 STD Sound
Pressure (dB)
70,8
0,7
75,8
0,7
80,8
0,7
85,7
0,7
Modulation
Channel
Frequency
(MHz)
Analog
5
462.6625
Analog
6
462.6875
Analog
7
467.7125
Analog
8
467.5625
2000
3150
4000
37.4
39.6
38.9
2.8
2.8
3.6
2.9
2000
3150
4000
36.8
39.4
39.0
2.4
2.7
3.1
2.4
2000
3150
4000
36.1
37.3
37.2
3.5
3.0
3.5
3.3
C:3 Attachment
E
E
E
K
E
AF
E
E
E
E
E
Type
Modulation
Channel
FRS
Analog
FRS
Analog
FRS
Analog
FRS
Analog
ANSI S3.19-1974
6300
8000
NRR
37.9
39.2
27
2.1
3.3
ANSI S3.19-1974
6300
8000
NRR
37.7
38.9
28
1.8
2.9
ANSI S3.19-1974
6300
8000
NRR
34.7
34.8
25
3.2
3.3
C:4 Head Size
SML
SML
L
L
L
L
L
L
L
SML
L
Frequency
Type
Modulation
(MHz)
9
467.5875
FRS
10
467.6125
FRS
11
467.6375
FRS
12
467.6625
FRS
CSA
Class
AL
CSA
Class
AL
CSA
Class
A
Analog
Analog
Analog
Analog