Calibration tutorial

This tutorial walks you through the steps to calibrate Sonneta Voice Monitor. You will need a sound-level meter and another person to act as a test subject for this tutorial.

Calibrating the dB-Scale

  1. Set the sound-level meter to the dB 'C' scale with 'F' time-weighting.
  2. Hold the sound-level meter 30 cm in front of a test subject's mouth.
  3. In Sonneta Voice Monitor:
    • On iPad, tap the Settings button at the top-left of the screen to bring up the Settings screen.
    • On iPhone or iPod touch, tap the settings button  in the toolbar on the main screen to bring up the Settings screen.
    • Choose the Calibration item from the Settings screen.
  4. Have the subject hold or place the iPad, iPhone, or iPod touch in the same position and orientation as they would when practicing with Sonneta Voice Monitor.
  5. While you watch the sound-level meter, have the subject say "Aaaah" in a loud voice for at least 2 seconds.
    • The progress bar on the Sound Level Calibration screen should reach completion.
  6. Enter the subject's sound pressure level reading from the sound-level meter.

To delete a calibration and try again, tap the Trash button.

Sonneta Voice Monitor will remember a distinct calibration for each input such as the internal microphone, a headset microphone, or an external USB device. When the current input has a valid calibration, the text "CAL" is displayed in green in the lower-right corner of the Sound Level display; and the date of the calibration is displayed on the Settings screen.