B)
B:1
B:2
C)
C:1
C:2
D)
D:1
D:2
E)
E:1
E:2
F)
MT15H7B*
125
250 500 1000 2000
Mean
15.6 23.2 33.1 34.6 35.7 38.1 42.2
Attenuation,dB
Standard Deviation
3.3
MT15H7F
125
250 500 1000 2000
Mean
17.2 24.2 33.1 37.7 34.4 37.4 40.1
Attenuation,dB
Standard Deviation
3.3
MT15H7P3*
125
250 500 1000 2000
Mean
15.6 21.5 29.8 34.2 32.3 33.1 35.3
Attenuation,dB
Standard Deviation
3.3
G)
Soundlevel in dB (A) inside the cup, max 85 dB (A)
90
80
70
60
50
90
60
70
80
Soundlevel in dB (A) outside the cup.
Max input level 115 db (A)
B:3
C:3
D:3
3150
4000
2.8
2.4
2.3
2.2
2.6
3150
4000
2.9
2.5
3.5
2.8
2.3
3150
4000
2.2
2.8
2.4
2.3
2.6
100
120
110
1
C:4
H
M
6300
8000
40.0 40.8
31 dB
29 dB
24 dB
2.7
2.9
2.5
H
M
6300
8000
37.5 38.8
31 dB
29 dB
24 dB
2.9
2.1
2.7
H
M
6300
8000
34.2 33.8
31 dB
29 dB
24 dB
2.7
2.9
2.5
H)
Hours/day
1
8
6
4
2
0
4x
x
2x
Mean level/electrical input signal
Music/compressed speech x = 0.40 V
Non-compressed speech x = 0.63 V
Class
NRR
L
25 dB
A
L
NRR
Class
26 dB
A
Class
L
NRR
22 dB
B
8x
16x
2
3
4