Yes, you can.
If you don't still have the 2.3 scripts and sound folders, you can download them from here:
http://www.trepidstudios.com/ff/file..._2.3_Patch.exe
Install it to a folder on your desktop or somewhere NOT in your game's directory, and copy/paste the sentences.txt file in the scripts folder, then in the sounds folder, copy/paste the vox folder.
Or, if you want to disable the announcer entirely (meaning the announcer never speaks but you still get the on-screen text notifications) just read up here:
http://forums.fortress-forever.com/s...ad.php?t=20680