1. Take your time.
  2. Listen to the digits.
  3. Always enter three digits after the stimulus stopped.
  4. If you make an error:
    • press clear
    • or use the "delete" key (Del) of your key board
  5. Enter the digits in the order you heard them. If you did not understand any of them, please make your best guess.
  6. The next sound sample will follow automatically.

Note:
Since we are looking for a threshold, it is natural to make mistakes. Please do not worry about making mistakes.