Getting Started Guide
40 APx511 B Series Hearing Instrument Analyzer: Getting Started Guide
when the coupler SPL has stabilized to within 3 dB of the
steady value for a 90 dB input SPL, at one or more of 250,
500, 1000, 2000, 4000 Hz, with the gain control at RTS.
Release: For hearing aids with AGC, the time between an
abrupt change from 90 to 55 dB input SPL and the time
when the coupler SPL has stabilized to within 4 dB of the
steady value for a 55 dB input SPL, at one or more of 250,
500, 1000, 2000, 4000 Hz, with the gain control at RTS.
SPLITS Response
For hearing aids with an inductive input coil (T-coil), the
coupler SPL as a function of frequency when the hearing
instrument, with gain control at RTS, is oriented for maxi-
mum output on a telephone magnetic field simulator
(TMFS).
IEC60118-7
These IEC60118-7 measurements are supported:
OSPL90 curve
OSPL90 Curve measures coupler output sound pressure
level (OSPL) as a function of frequency, for a 90 dB input
SPL.
HFA OSPL90
HFA OSPL90 displays the high frequency average (aver-
age SPL at 1 kHz, 1.6 kHz and 2.5 kHz) for a 90 dB input
SPL.
Full-On Gain
Full-On Gain (FOG) displays gain for an input of
50 dBSPL when the gain of the hearing instrument is at its
full-on position.
HFA Gain
HFA Gain displays the HFA FOG for an input of
50 dBSPL when the gain of the hearing instrument is at its
full-on position.
Set RTS
An interactive dialog to set the Reference Test Setting,
using the volume control on the DUT.
Frequency Response
Coupler SPL as a function of frequency for a 60 dB input
SPL, with gain control at RTS.
Battery Current
Electrical current drawn from the battery when the input
SPL is 65 dB at 1000 Hz and the gain control is at RTS.
Equivalent Input Noise
SPL of an external noise source at the input that would
result in the same coupler SPL as that caused by all the
internal noise sources in the hearing instruement.
Harmonic Distortion
Ratio of sum of the powers of all the harmonics to the
power of the fundamental at various levels and frequencies.
Input Output
For hearing aids with AGC, the coupler SPL as a function
of the input SPL, at one or more of 250, 500, 1000, 2000,
4000 Hz, with the gain control at RTS.
Attack and Release
Attack: For hearing aids with AGC, the time between an
abrupt change from 55 to 90 dB input SPL and the time
when the coupler SPL has stabilized to within 3 dB of the
steady value for a 90-dB input SPL, at one or more of 250,
500, 1000, 2000, 4000 Hz, with the gain control at RTS.
Release: For hearing aids with AGC, the time between an
abrupt change from 90 to 55 dB input SPL and the time
when the coupler SPL has stabilized to within 4 dB of the
steady value for a 55 dB input SPL, at one or more of 250,
500, 1000, 2000, 4000 Hz, with the gain control at RTS.
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