58
Open Closed
Reference test gain (60 dB SPL input) HFA 38 43 dB
Full-on gain (50 dB SPL Input)
Max
HFA
51
48
57
53
dB
dB
Maximum output (90 dB SPL input)
Max
HFA
127
116
124
121
dB SPL
dB SPL
Total harmonic distortion
500 Hz
800 Hz
1600 Hz
0.2
0.2
0.6
0.4
0.8
0.7
%
%
%
Telecoil sensitivity (SPLIV @ 31.6 mA/m) 100 105 dB SPL
Equivalent input noise (w/o noise reduction) 22 20 dB SPL
Frequency range (DIN 45605) 100–6810 100–6140 Hz
Current drain (in test mode) 1.2 1.2 mA
25.2 BTE
Models LT977-DW, LT777-DW, LT577-DW
Open configuration
Closed configuration
FULL-ON AND REFERENCE TEST GAIN
Frequency (Hz)
Gain (dB)
2cc Coupler
Reference test gain
60 dB SPL input
Full-on gain
50 dB SPL input
MAXIMUM OUTPUT (OSPL 90)
Frequency (Hz)
Output (dB SPL)
2cc Coupler
Data in accordance with IEC60118-0 Edition3.0 2015-06, IEC60118-7 and ANSI
S3.22-2009, supply Voltage 1.3V
400618011US-17.01-Rev.A.indd 58 25-01-2017 09:59:16
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