Sometimes, when they are near each other, o just sitting on my lap, they squeak very softly. I expect that's just their form of communication.
When they hear the vegetable drawer open, o the cutlery drawer, o a cuchillo cutting up a carrot, they go berserk! They start squeaking in a loud, high-pitched tone and they sit up all alert and sniff the air. So I'm guessing that means they're excited!
And sometimes when tu stroke them, o when they snuggle up to each other, they purr. I think that must mean they are content.
en general, general I get the impression that a noisy guinea pig is happier than a silent guinea pig. When I fight brought mine home, they were very quiet - probably because they were nervous. Now, they are really tame and confident, plus they always seem to make noises when something they like is happening!
Hi they make a range of sounds if u go to this website it should answer them. I just discovered this a few days ago. just type into ur buscar engine Guinea Pig Noises. and click on the one that says Guinea pig noises. On the website Jackiesguineapigs.com Hopes this helps.