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Fitting Instructions
Fig. 1
Up Position
Fig. 4
In-Use Position
Fig. 2
Fig. 3
Down Position
Out Position
Fig. 5
Back Position
ANSI S3.19-1974 Table (NRR Table)
A1: Frequency, Hz
125
250
A2: Grand Mean Attenuation, dB
16.7
21.2
A3: Standard Deviation, dB
5.2
4.1
EN 352-3:2020 Table (SNR Table)
B1: Frequency, Hz
125
250
500
B2: mF (dB)
17.0
22.1
28.7
B3: sf (dB)
4.9
3.5
3.0
B4: APVf
12.1
18.6
25.7
SNR
H
Mean, dB
31.4
34.4
Standard Deviation, dB
2.4
2.6
Value, dB
29
32
Audio Input (EN 352-6)
Bluetooth (HFP): The maximum SPL is 84.8 dB(A) at -14 dBFS
The usage time for the maximum input signal that corresponds to an equivalent sound
output
level of 82 dB(A) over 8 h is: 4.21 h at -14 dBFS
Criterion Input Signal:
-31.6
dBFS
Relationship between sound output level and input voltage
Input Level dBFS
-64
-59
-54
Sound Pressure
60.1
65.0
70.0
Level, dB(A)
Entertainment (EN 352-8)
Bluetooth (A2DP): The maximum SPL
is 78
500
1000
2000
3150
4000
6300
26.7
29.4
32.6
33.3
38.9
36.7
2.8
2.6
3.7
3.6
3.9
3.0
1000
2000
4000
8000
SNR
29 dB
30.2
34.6
40.4
35.8
H = 32 dB
2.6
4.4
5.2
4.5
M = 27 dB
27.6
30.2
35.2
31.3
L = 20 dB
APVf=MF-SF (dB)
M
L
29.1
23.2
2.3
3.5
27
20
-49
-44
-39
-34
-29
-24
75.0
79.9
82.0
82.0
81.9
82.4
dB(A) at -10 dBFS
CSA
8000
NRR
CLASS
34.1
B
21
4.2
-19
-14
82.6
84.8
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