158 FONIX FP35 Hearing Aid Analyzer
The Real-ear SPL and Real-ear Insertion Gain screens also contain information
about the settings used to create the target: Not all settings are available with all
targets.
10. Age of patient
11. Fitting rule selected and the type of fitting. “U” indicates a unilateral fitting.
“B” indicates a bilateral fitting.
12. Compression threshold of the aid, number of channels of the aid, and the
type of output limiting. “W” indicates wideband limiting. “M” indicates
multi-channel limiting.
5.8.2 Defining the Menu Items
There are a number of menu settings that affect both measurements and tar-
gets. Some of these settings are only available when the USER LEVEL is set to
ADVANCED in the Default Settings menu. See Section 2.3.2 for details. These
menu items are marked with an asterisk (*).
Main Real-Ear Menu
To enter the menu, push [MENU] from any of the Real-Ear Measurement
screens. Use the arrow keys as you normally would to make selections.
EAR—The ear being tested. Select LEFT, RIGHT, or NONE.
DATA/GRAPH—The type of display. Choose between a graphical display and a
numerical display.
UNAIDED—The type of unaided response. Select AVG to use the average
unaided response, or select CUSTOM if you are going to measure your client’s
unaided response.
AID GROUP—The type of hearing aid being tested. Select STANDARD, AGC,
or ADAPTIVE (for adaptive AGC circuits). This selection sets the various delay
times used in pure-tone tests so that they are appropriate to the aid’s circuitry.
See Section 2.4 for more information on delay times.
SOUND FIELD—The sound field azimuth you are using with the real-ear mea-
surements. We recommend 45º for more repeatable results.
AUTO TEST—The status of the Auto Test. When enabled, the FP35 will auto-
matically measure AIDED 1, AIDED 2, and AIDED 3 without stopping for user
intervention. See Section 5.4.3 for details.
VISIBLE SPEECH—Display used when the FP35 analyzer is in Spectrum
Analysis mode (requires Composite/Digital Speech Option). BARS displays a
set of vertical bars representing the maximum peaks of the measurements that
reach above the lower limits of the speech banana. AVERAGE displays a long
term average of the response using a peak decay method.
