Ok at work the other day, I went into a meeting room and someone had left a single apple earbug in there. I figured they forgot it, and placed it in a visible place at the office.

Weirdly the next day I overheard a colleague saying he found an earbud in the same meeting room and wondering what to do with it.

This is a room typically used to discuss different company aspects that are not knowledge to most employees.

Question 1: can someone put an earbud in a meeting room and listen to conversations from outside?

Question 2: if yes, and if it I find this earbud there again, is there a way to locate the owner can be identified?