Getting Started Guide
APx511 B Series Hearing Instrument Analyzer: Getting Started Guide 45
Measurement Overview
To accomplish measurements that are in line with the ANSI standards, refer to the following table for guidelines of functions to
call and what parameters to supply.
Some measurements provide data as single values. Some
metrics must be derived from the measurement results.
APxHiTest Graphics
Two measurement functions support capturing the plot
screen as a bitmap that can be displayed by the application.
They are MeasureFrequencyResponse and MeasureInput-
Output. They make use of optional arguments beyond the
required arguments. The default is to skip the screen cap-
ture. If a string file name is supplied, then the image will be
stored in the named file with the dimensions of 640 by 480.
The call can also include the x and y dimensions of the
desired image size. The file name should be a fully quali-
fied name of path and file name.
ANSI [IEC] Test Name ANSI [IEC] Level HI Dut APxHiTest Measurement Name
OSPL90 90 dBSPL At FOG MeasureFrequencyResponseLevel
HFA OSPL90 90 dBSPL At FOG HfaMeasurement with
HfaResultsType.HfaOSPL
Full On Gain 60 dBSPL [50] At FOG MeasureFrequencyResponseLevel
HFA Gain 60 dBSPL [50] At FOG HfaMeasurement with
HfaResultsType.HfaGain
Set RTS 60 dBSPL At FOG HfaMeasurement with
HfaResultsType.HfaGain
Frequency Response 60 dBSPL At RTS MeasureFrequencyResponseLevel
Harmonic Distortion 70 @ 500Hz, 70 @ 800 Hz,
60 @ 1.6kHz
At RTS MeasureTHD
Equivalent Input Noise 50 dBSPL At RTS EinMeasurement
Battery Current 65 @ 10kHz At RTS MeasureBatteryCurrent
SPLITS [ETLS] 31.6 mA/m At RTS and Telecoil MeasureTelecoilSensitivity, and
MeasureFrequencyResponseLevel for plot
data
HFA MASL 10 mA/m At FOG and Telecoil MeasureTelecoilSensitivity
Input / Output 50 to 90 dBSPL in 5 dB steps At RTS and Acoustic InputOutputResponse
Attack / Release 50 and 90 dBSPL At RTS and Acoustic AttackAndRelease
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