Calibration Mode: Sensitivity Testing

Procedure

  1. In the Song Meter Configurator app, open the Utilities menu:
    1. Pair the Recorder with the Song Meter Configurator App.

      Configure and Unpair icons will appear next to the recorder's name.

    2. Tap the Configure icon for the paired Song Meter Mini Bat 2 in the Recorders screen.
    3. Tap the Utilities icon in the upper-right corner of the Configuration Editor.
  2. In the Utilities menu, tap Test microphone.
  3. Close the lid of the Song Meter Mini Bat 2.
  4. Turn on the Ultrasonic Calibrator and toggle the mode switch to CAL.
  5. Position the back of the Song Meter Mini Bat 2 against the front face of the Ultrasonic Calibrator.

    The left edge of the recorder should be touching the calibrator's two toggle switches, and the ultrasonic microphone should be centered over the calibrator's speaker grate.

    When the Calibrator's power switch is on the left and Cal/Chirp switch is on the right, the power LED protrudes just above the power switch. The recorder should be positioned below the switches, not blocking the power LED.
  6. Observe the amplitude reading in the Test microphone window. If the value is higher than -32 dB, the microphone has passed and is ready to use. If the value is lower, the microphone has lost some or all of its sensitivity and should be replaced.

    dBFS readings in the Test microphone window are negative numbers, so a "higher" value than -32 dB is one that is closer to 0 dB. For example, a reading of -20 dB would pass, while a reading of -40 dB would fail.

    The Test Microphone window displays a level reading for the ultrasonic microphone in negative values of decibels (dB).