Original by Nyteshade : http://us.battle.net/wow/en/forum/topic/970017166
Since it seems the old forums will be vanishing in the near future, it is time to migrate some of the more useful information over.
edit: Forgot to give credit to Stylo for the original post in the old forums.
If you are like me then you are being driven nuts by the constant glug glug glug sound!!!!
Well with very little digging I have found the sound file responsible for my torment, so without anymore babbling here is how you kill that annoying sound.
[NOTE THAT ALL FOLDERS AND FILES ARE CASE SENSITIVE!]
Step 1: File Structure
Go to your World of Warcraft/Data folder, check for a folder named "Sound" if no folder exists make one.
Now go inside the Sound folder you created (or if one already existed ) now you are going to make another folder inside Sound named "Creature" (If for any reason one already existed leave it) go into your Creature folder.
Now the last folder you will make will be "WaterElemental" Your folder structure should now look like this: World of Warcraft/Data/Sound/Creature/WaterElemental
Step 2: Creating the File
This part is extremely simple, open up notepad, go to file/save as, save the file with the name "WaterElementalLoop.wav", save it where ever you like (also you must put the .wav after the name).
Now just move your new wave file into your WaterElemental folder, enjoy!