Well, this made my day.

So I'm sitting in the library and in a room they call the "reading room". It's a nice place: chairs, cushions, periodicals, encyclopedias and a huge table to do whatever. It's like my second crib. Today, there's a fellow in here with me. He's napping like a baby. In fact, here's a picture of the chap.

 Spoiler

Since I was here second, I'll just settle my things (laptop, books and backpack), down quietly and leave him in his peace. As I bend over the table to set up my laptop, I heard a voice from behind me. I turned around to find nothing but a chair and a wall. I figured I was hearing things. So I bent over again to continue unpacking when I heard the voice again! This time it was right behind me ear. Again, I quickly turned around to find nothing but the same chair and the same wall.

 Spoiler

I continued to unpack but with more caution this time. Nothing was heard. I reached under to plug in my laptop when there was the sound again! No doubt it was coming closer. Irritated, I kept myself bent over to try and listen to the voice. I heard it. It only spoke every few seconds. I was hardly able to make it out; there was mixed mumbling with a strong sound of snoring... snoring from the nearby napping lad? "Impossible!" I thought. No snore is that loud let alone being loud enough to sound like it's sneaking up on me.

I concentrated a bit more and no doubt about it, it was the sound of his snoring. But snoring that loud was not humanly possible! I gave a good look at him to find nothing but a common sleeping man. I looked around the room when noticed the ceiling...

 Spoiler

It turns out that the sound of his snoring was significantly amplified by the dome shaped ceiling. His mouth pointed upwards towards one edge of the dome. I, being positioned on the opposite edge of the dome, when bent over caught the full blast of the amplified snore as the sound waves traveled the full half circle around the dome. Thus hearing the snore right n my ear every time I was bent over. Man, I love physics.