Nora's actions woke Justin up.
His voice was clear as he asked, "What's wrong?"
He did not look like he was asleep.
Nora did not care about this. She stood up and rushed to the study room. Then, she put on her earphones. Her mother's last words started playing on them.
She took out a pen and paper and listened carefully.
After a while, she suddenly looked up at Justin and asked, "Do you have good hearing?"
Justin hesitated. "Quite."
"Then you do it!"
Nora stood up and got Justin to take her place on the seat. She handed both earphones to him. "Listen carefully to the background noise. There's a metronome. Help me decipher the difference between the beats."
Justin did not understand what she wanted to do, but he did as she asked. He frowned and listened attentively to the recording.
After listening for a few seconds, Justin realized something.
