I assume that you have HoN downloaded, therefore the sounds are found in .ogg files in your resources0.s2z file.
1. Go to: Program Files \ Heroes of Newerth \ game ( If not in Program files, then the path you've installed HoN into ) 2. Find resources0.s2z and open it up with WinRaR or WinZip, or any other extraction program. 3. The announcer sounds ( Double tap, hat trick, etc. ) are found from the path resources0.s2z\shared\sounds\announcer
All the files displayed there in the announcer folder, are the default ones. And you can choose others
from the different folders.