FONIX® FA-10 Hearing Evaluator™ - Frye Electronics
FONIX® FA-10 Hearing Evaluator™ - Frye Electronics
FONIX® FA-10 Hearing Evaluator™ - Frye Electronics
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The right channel VU meter will display “0 VU” during the increment interval.<br />
Perform the desired right ear SISI hearing test.<br />
Notes:<br />
To manually cause a SISI increment, turn the increment channel simulus Reverse off. Then<br />
press and release increment channel Stimulus button as desired.<br />
The -2.5 dB stimulus switch on the increment channel can be used to decrease the increment<br />
by 0.25 dB.<br />
Many other Option C setups are possible, although the other Option C setups may not be<br />
defined as SISI. You may select different inputs and outputs.<br />
Option C works (for example, to the left ear) by directing the reference tone from the right<br />
channel to the left channel, then producing an additional increment tone in the left channel.<br />
In order for the increment feature to operate, the left and right channels must be added together.<br />
For example, if you are testing the left ear, the right output must be set to left channel.<br />
Option C is active when all four of these conditions are met:<br />
• Left <strong>Hearing</strong> Aid Simulator switch set to Off<br />
• Right <strong>Hearing</strong> Aid Simulator switch set to Option C<br />
• Pulse is ON<br />
• Stimulus is enabled for each channel or stimulus is enabled for one channel if Stenger<br />
is selected.<br />
Masking of the SISI untested ear is not possible with Option C.<br />
A stereo monitor headset will allow the operator to clearly hear the SISI increment in the<br />
increment channel.<br />
4 .6 RS232 Option<br />
The RS232 option consists of hardware and software to be installed in the FONIX <strong>FA</strong>-<strong>10</strong> and<br />
<strong>FA</strong>-12 <strong>Hearing</strong> Evaluators. It also includes the USB RS232 cable, and a CD ROM containing<br />
the documentation, device drivers, sample programs, and diagnostics which run on the PC.<br />
The RS232 option allows the computer to receive data from the audiometer and to control the<br />
audiometer operation.<br />
Information can be retrieved from the audiometer as either ASCII data streams or via the<br />
<strong>Frye</strong> Instrument Packet Protocol. The audiometer can be controlled via the <strong>Frye</strong> Instrument<br />
Packet Protocol only (for reliability reasons).<br />
All control positions on the audiometer front panel can be read at any time through the<br />
RS232 interface. A 16-step buffer is provided to prevent lost data should the computer not be<br />
able to read the panel before the next change occurs.<br />
28 Chapter 4: Operation
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