Operation and Troubleshooting Guide In-Progress

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Setup

  1. Turn on power (top-right button on the back of the unit) and the display should appear.
  2. Make sure the audio cable isn't plugged into anything, touch the display twice to move to the calibration screen.
  3. During the calibration absolute silence is necessary, no scanner noise, and no audio.
    • If calibration is successful, a green checkmark will appear next to the Left and Right calibration boxes.
  4. Once calibrated successfully, touch the ANC button in the upper right-hand corner of the screen.
  5. Start your calibration or "learning" sequence.
    • This sequence should be run before the task sequence and allows the noise cancellation algorithm to learn the noise coming from the scanner.
    • If the audio cable is plugged in, make sure no audio is being played or else the learning will fail.
    • The learning sequence should be at least 30 seconds long and should be the same exact sequence type being used for your fMRI tasks.
  6. Once the learning phase is complete, there should be a significant decrease in the scanner noise heard by the participant.
    • This is signified by the decrease in the dB value and the dB waveform seen on the screen for each ear.
  7. The algorithm will remain active unless stopped by the user or the system (see Troubleshooting).


TroubleShooting