$ sudo apt-get update
$ sudo apt-get install freeciv-sound-standard 

freeciv-sound-standard is installed in your system.

Make ensure the freeciv-sound-standard package were installed using the commands given below,

$ sudo dpkg-query -l | grep freeciv-sound-standard *

You will get with freeciv-sound-standard package name, version, architecture and description in a table

freeciv-sound-standard package basic information: