==unplugged.sh==
#!/bin/bash

canberra-gtk-play -f /home/eins/solemn.ogg

==plugged.sh==
#!/bin/bash

canberra-gtk-play -f /home/eins/solemn.ogg

==notify.rules==
KERNEL=="sd[a-z][0-9]",SUBSYSTEMS=="usb",ACTION=="add",RUN+="/bin/bash /home/eins/plugged.sh"
KERNEL=="sd[a-z][0-9]",SUBSYSTEMS=="usb",ACTION=="remove",RUN+="/bin/bash /home/eins/unplugged.sh"