A small animal with a loud signature call
Guinea pigs have one genuinely loud sound: the wheek, a rising, insistent whistle they produce at full volume when they expect food. Rustle a bag, open the fridge, or chop something in the kitchen, and a pair of guinea pigs will wheek in chorus like tiny car alarms going off together. It is the sound most owners end up loving most, but nobody should call it quiet — it carries through a whole flat. Everything else in the repertoire is softer, and a household quickly learns the vocabulary.
The everyday sounds, translated
Chutting is the contented mutter a pig makes while pottering around its enclosure or across your lap. Purring depends on context: a low, loose purr during gentle stroking is contentment, while a higher, tense purr from a stiff body means the handling has gone on long enough. Teeth chattering is a warning — a clear 'back off' — heard most often between pigs sorting out rank, and rumblestrutting, a swaying walk with a low rumble, is the display that goes with it. Shrieking is different in kind: a short, sharp cry means fright or pain, and a pig that shrieks when picked up or when touched in one spot should be checked over and, if it repeats, seen by a vet.
When the noise happens
Guinea pigs pattern their noise around food and people, so the loudest moments are mealtimes, your arrival home, and any kitchen activity that might conceivably involve vegetables. Evenings bring contented pair chatter and the sounds of hay being hauled around. Deep night is genuinely quiet: guinea pigs nap in short bursts around the clock rather than sleeping in one long block, so someone sleeping nearby may hear soft rustling, the click of a water bottle, and the occasional mutter — more like a ticking clock than a conversation.
Reducing noise without reducing pigs
You cannot train the wheek out of a guinea pig, and you would not want to try; it is how the animal talks to you. You can shape its timing: a predictable feeding routine concentrates the loudest wheeking into expected windows, and keeping the enclosure out of a light sleeper's bedroom solves the rustling problem. A pair is not meaningfully louder than a single pig — and since guinea pigs should never live alone anyway, the chorus of two is simply the sound of the species kept properly.
Noises that carry information
Because guinea pigs are vocal when well, a change in the soundscape is itself a sign worth noting: the pig that stops wheeking for food, breathes audibly, or cries out when passing urine is flagging a problem early, and that is a prompt — often same-day — conversation with a vet. For ordinary guesswork like that, put a follow-up question to KinsLe's Kimmy; she answers using the KinsLe Answers library.