FONIX® 8000 - Frye Electronics

Appendix G 223
Glossary of Terms
AGC Automatic Gain Control (or Automatic Volume Control). A feature on
a hearing aid that automatically adjusts the gain, depending either on
the input level (AGC-I) or the output level (AGC-O). Also known as
“Compression.”
AMBIENT The environmental sounds in a testing area.
NOISE
ANEChOIC A room with little sound reverberation; a room constructed to be
ChAMBEr acoustically absorptive.
AMPLITUDE A measure of the magnitude of a signal.
ANSI American National Standards Institute. A national organization that
determines standards for testing equipment. A section number and date
(year) following the initials “ANSI,” designate the standard referred to.
ArTIFACT A false reading.
ASP Automatic Signal Processing. A feature on a hearing aid intended
to overcome the effects of background noise, making it easier to
understand speech when noise is present. The term ASP is not
standardized, and may refer to various forms of signal processing.
Usually, however, ASP refers to a reduction in low-frequency gain in
the presence of ongoing background noise.
AVG Short for Averaging. A feature on the 8000 Test System that uses three
pure tones and averages them for the final measurement.
BATTErY A battery simulator that conforms to the size and shape of a battery
SUBSTITUTION used in a hearing aid. It connects to the Battery Voltage Supply,
PILL providing the proper voltage to the hearing aid.
BErGEr A prescription formula developed by Kenneth W. Berger.
BIAS FrEqUENCY The background frequency, acting as noise, when using the Digital-
Speech-in-Noise test.
BIAS AMPL The amplitude of the background frequency used in the Digital-
Speech–in-Noise test.
BICrOS A CROS aid that has two microphones, one at each ear, sending both
signals to one ear.
BLOOMING A characteristic of pure tone testing at high levels, that typically shows
EFFECT low frequencies being amplified more than they are under normal use
conditions.