Real-Ear Measurements 131
FIT TYPE—Type of fitting Choose from UNILATERAL and BILATERAL. Bilateral
fittings require the audiograms of both ears to be entered.This is only available
with a fitting rule selection of NAL-NL1.
AID TYPE—Style of hearing aid. Choose from BTE, ITE, ITC, and CIC.
VENT—Type of venting on the hearing aid. Choose from OPEN, TIGHT, NO
VENT, 1 mm, 2 mm, and 3 mm. This selection is only available with a fitting
rule selection of NAL-NL1.
TUBING—Type of tubing on the BTE hearing aid. Choose from LIBBY 4, LIBBY
3, CFA #2 HORN, CFA #2 BORE, #13, 6C5, and 6C10. This selection is only
available with a fitting rule selection of NAL-NL1 and an AID TYPE of BTE.
REFERENCE—Type of leveling used in the real-ear measurement. When HEAD
SURFACE is selected, leveling is performed with the patient within the sound
field and the reference microphone on top of the ear. When UNDISTURBED is
selected, leveling is performed by holding the reference microphone in front of
the sound field speaker. This selection is only available with a fitting rule selec-
tion of NAL-NL1.
Advanced Audiogram Entry Menu
Press [NEXT] from the Main Audiogram Entry menu to enter the Advanced
Audiogram Entry menu.
SPEAKER—The sound field speaker selection. Choose to use the INTERNAL or
an EXTERNAL speaker.
WARBLE SOURCE—Type of pure-tone warbling used when taking measure-
ments. Choices are AUTO, FAST, SLOW, and OFF. It is recommended to set this
to AUTO. See Section 2.5.1.4 for more details on warbling options.
PROBE MIC (HL)—The status of the probe microphone (ON or OFF). This selec-
tion is only available if you have the Audiometer Option.
LEVELING SOURCE—The amplitude used for leveling the sound field speaker.
The default is 70 dB for real-ear measurements. See Section 3.2.4.
PRINT LABEL—The status of the printer label.
PRINTER—The printer selected. Choose between using an INTERNAL or an
EXTERNAL printer..
5.4 Insertion Gain Testing
An insertion gain test measures how much gain the hearing aid is providing
over the client’s unaided response. This section assumes you have already gen-
erated a target curve (see Section 5.3.3 and 5.3.4) and are ready to test.
