Last weekend, I had a small gathering with two friends at a KTV we frequented during our later university years. Since there were few people, I ended up singing from 8:30 PM until past 1:00 AM. Afterward, I took a taxi back to my dorm, showered, and collapsed into bed, exhausted.
The next morning, the noise from ongoing construction outside was still loud, so I went to the office to study. During the day, amidst various environmental sounds, I didn’t notice anything unusual. However, by evening, especially after 8 or 9 PM, as the outside noise gradually subsided, I began to sense an abnormal ringing in my ears. By around 11 PM, this sound became unbearable in the quiet, empty office.