In the data folder you will need to create a 'sound' folder, then within that create an 'ogg' folder.
Depending on the sound you are replacing, that will also need it's own folder.
This is what my data\sound\ogg folder currently looks like:
Oh, I agree with the general pop stuff from Cimerora, First Wardand Night Ward mobs and the older stuff too like Lost tv heads and such. There's a lot of that which should be available to players.
I'll likely be a minority here but when it comes to signature heroes and villains, I'm okay with them having exclusive costume pieces that players do not have access to.
I don't understand the difference between what you're asking for and the existing 'Post your Bio' thread @justicebeliever pointed to. Folks there are also posting full bios and screenshots of their characters. There may also be something in the RP section.
I attached an .ogg file in a recent post and it appeared in the post with a Play bar rather than as an attachment. After leaving the thread and returning the attachment was broken and the post appeared like this:
When I went back in and deleted the original attachment, replacing it with a .zip file, the error remained.
I've found it quite annoying in the past with my RP group back on Legacy. If I recall correctly, you can still hear her from over at the bar behind her.
You can silence the sound by dropping the the attached file into this CoH directory.
\data\sound\ogg\NPCs\
This will actually change it for every NPC that slurps coffee, not just WW.
Edit: Okay, what did they do to the forums...? It's breaking the audio files.
Drink_01.ogg
Drink_01.zip
Same here, on both regards, that's why have modified or silenced several sounds within the game,.
Demon Lt rawrs drive me nuts, so I changed them to infant giggles.
Bots stomping around, now squeak like rubber duckies.
Glowies now cackle like hyenas.
Other, like Spines' aura or Lightning Field, I just silence.