The sound made when eating

I have a few people around me that are really loud eaters. I'm not telling them to be quiet while eating, of course - these aren't my children, but I digress.

What the the word for the sounds made when eating?

Solution 1:

• munch generally noisy eating, lots of saliva is involved and the person forgets to close their mouth -- not attractive.
• crunch a sound usually associated with eating crisps (BrEng), chips (AmEng) or a juicy crisp apple
• slurp the sound you make when eating liquids, especially true for soups or sucking a soft drink through a straw.

Solution 2:

Lots of words are used for both the action of eating noisily, and the sound...

gobble, chomp, champ, guzzle, slurp, etc.

...but I don't know any word that specifically and only refers to the sound, not the action. Gobbling, chomping, etc. can be either how someone eats, or the sound they make when eating like that.

Note that the last two verbs in my list are more often used of people noisily consuming liquids, but here are a few dozen written instances of he slurped his noodles showing that's not always the case.