Frye FONIX 7000, Operator'S Manual

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FONIX 7000 Hearing Aid Analyzer
GIFROC The inverse of “CORFIG.” GIFROC is the transformation that, when
added to a coupler response, will give the estimated insertion-gain
response.
GRAPH A grid of lines, with the vertical lines representing one set of
information and the horizontal lines representing another. A “Curve”
superimposed on a graph grid, gives information about test results.
HAIC Hearing Aid Industry Conference.
HARMONICS Integral multiples of a pure tone. The tone itself is the 1st harmonic,
or fundamental frequency; twice the frequency of the tone is the 2nd
harmonic; three times the frequency of the tone is the 3rd harmonic;
etc.
HARMONIC The presence of harmonics in a reproduced signal that are not present in
DISTORTION the original signal.
HFA High frequency average: according ANSI S3.22-1987, the averaged
response at 1000, 1600, and 2500 Hz.
HEAD BAFFLE Refers to the comparative augmentation of high-frequency sound
EFFECT caused by the acoustic diffraction of low-frequency sound by the head
and pinna blending to produce a baffle.
HL Hearing Level. The amount of decibels above audiometric zero at
which a measured ear barely hears a sound.
Hz Hertz. Unit of frequency, referring to cycles per second.
ICRA International Collegium of Rehabilitative Audiology.
IEC International Electrotechnical Commission. An international
organization that sets standards for measurements.
INSERT Earphone whose transducer is joined to the ear by means of a tube
EARPHONE attached to a foam eartip that is placed into the outer ear canal; used in
finding Real Ear to Coupler Difference (RECD) measurements.
INSERTION A measure of the acoustic benefit of a hearing aid, measured in a
GAIN patient’s ear. The insertion gain is the difference, at any particular
RESPONSE frequency, between the Aided Response and the Unaided Response.
When considered across a range of frequencies, the measure is called
the “Insertion-gain Response.” When measured in a real ear (as
opposed to a manikin), the insertion-gain response is called the “Real
Ear Insertion-gain Response” (or “REIR).
IN-SITU Latin for “in position.” In audiometry, it designates measurements
taken with the hearing aid “in place” in the ear.