I was reading this paragraph. "...and people always talk much louder to compensate for the noise. I was pleasantly surprised that I was able to hear the server

I was reading this paragraph. "...and people always talk much louder to compensate for the noise. I was pleasantly surprised that I was able to hear the server without any extra effort..." And initially was wondering how he got an audio feed to his server in a restaurant and then was like "Why would he want to listen to his server". And then realized that there are human servers in restaurants.