34 FONIX FP35 Hearing Aid Analyzer
• TheLONG SETTLE time is the amount of time each frequency in an
input/output sweep is presented before a measurement is made. It also
sets the delay between the individual frequencies of three-frequency
averages and distortion measurements.
The default delay times are as follows:
Standard PREDELAY: 100 ms
SHORT SETTLE: 0 ms
LONG SETTLE: 0 ms
AGC PREDELAY: 500 ms
SHORT SETTLE: 50 ms
LONG SETTLE: 100 ms
Adaptive PREDELAY: 3000 ms
SHORT SETTLE: 100 ms
LONG SETTLE: 250 ms
When you are testing an adaptive AGC aid, any test using the three frequency
average defined in AVG FREQS (full-on gain, reference test gain, distortion
measurement) is actually taken four times. In order to give the aid a chance to
settle, the first three measurements are discarded. The fourth measurement is
what appears on the screen as the final measurement.
2.5 Source Types & Measurements
The FP35 analyzer comes standard with the following pure-tone signals:
• NORM—A detailed frequency response curve that gives you information
on the amplification of 43 different frequencies between 200 and 8000 Hz.
• FAST—A continuous pure-tone sweep that updates as quickly as once a
second. It takes measurements at 16 different frequencies between 200
and 8000 Hz.
• SHORT—A single pure-tone sweep of 10 different frequencies. It takes
about a second to complete.
• SINGLE—A single pure-tone frequency, or a continuous three frequency
average selected in the Advanced Menu.
•
LONG—A frequency response curve that measures 64 different fre-
quencies, containing more information (and taking longer) than the
standard NORM sweep.
If you have purchased the Composite Option with your FP35, you will also
have:
• COMP—A continuous real-time, speech-weighted signal made up of 79
different frequencies that update up to 5 times a second. The composite
signal gives you the advantage of seeing how an aid behaves to noise that
more closely simulates speech, and it lets you see immediately how the
aid responds to any change in the amplitude of the signal.
