One solution is to play perfectly so these announcements won't be played :P But you can also replace the sounds completely if you want (e.g. put some silence there instead ;)). Go to game settings, modding, enable audio modding. When you restart the game, go to game's data folder and look for audio subfolder with exported WAV files present (sounds for different weapons and announcements). You can then replace these files as you like and start the game again. This modding was originally meant for PC players so not sure how reliable it is on quest... Let us know in case you encounter any issues at info@songbeater.com :)