Technical Data
19
Maximum SSPL90
HFA full-on gain
Reference test gain
Frequency range
Total harmonic distortion
Equivalent input noise
Product size
107.2 dB
25.8 dB
22.8 dB
200 Hz to 7118.1 Hz
500 Hz: 1.4%, 800 Hz: 1%, 1600 Hz: 0.5%
28.7 dB
.79 x .56 x .42 inch
Technical Data – EarMate-4220 hearing aid
Battery type
and current
Battery size
Battery Life
(estimated)
.85 mA
10 (yellow tab)
82 hours
Since 1979
