The Emperor Unexpectedly Discovered That He Could Hear His Concubines' Voices

In the 21st century, I was squeezed by my boss and traveled to ancient times to become an emperor due to an accident. This was a huge fortune for a social creature. The good life was finally my turn. However, just when I was happy, I suddenly heard clear and sweet voices coming in and found something was wrong. No one opened their mouths to speak. I glanced around. Could it be that I could hear the voices of the concubines in the harem? That would be fun