This is a manual for AudCal audiometry calibration software
This manual describes how to use AudCal software to test and calibrate audiometers with the SoundAdvisor Model 831C. It covers system setup, test procedures, report generation, and equipment management. The software runs on tablets via WiFi and connects to the 831C for real-time data and test control. It also supports backup and firmware upgrades through G4 LD Utility on PCs.
AudCal includes preloaded equipment data for systems purchased together, and supports various microphone, coupler, and preamplifier combinations. Tests include frequency, hearing level, distortion, and speech measurements with defined stability criteria. Accuracy specifications are provided for each test type.
| Measurement Accuracy - FFT Amplitude | <110dB <+0.2dB, >110dB <+0.1dB |
|---|---|
| Measurement Accuracy - FFT Frequency | 100 Hz to 20 kHz < +0.02% Hz |
| Measurement Accuracy - Self Distortion | 100 Hz to 20 kHz < 40.04% |
| Measurement Accuracy - FM Modulation Rate | <40.2% <+0.2% Hz |
| Measurement Accuracy - Pulse Rise Time | <+0.7 <+0.4 ms |
The software requires a SoundAdvisor Model 831C Sound Level Meter, necessary microphones, preamplifiers, couplers, and the AudCal software. Systems can be preloaded with equipment data.
Connect your tablet to the 831C via WiFi, then use the AudCal App to control tests, view live data, and generate reports.
For frequency modulation, the carrier accuracy is <40.2% <+0.1% Hz, modulation rate <40.2% <+0.2% Hz, max frequency <+0.7% <+0.1% Hz, and min frequency < +0.6% <+0.1% Hz.