Scientists are turning to an unexpected ally in the study of language origins: dogs. At Eötvös Loránd University in Budapest, bioacoustics researcher Dr Tamás Faragó is leading a five-year project, K9VocLearn, to explore whether domestication gave dogs greater control over their vocal sounds.
The idea is rooted in a larger scientific question: how did humans become the only species capable of spoken language? Researchers say vocal learning -- the ability to adjust sounds by listening to others -- is a key step on that path. While humans excel at it, only a limited number of mammals show similar flexibility.
Dogs are especially interesting because thousands of years of living with people may have shaped not only their behavior, but also their communication. The team is examining whether traits linked to cooperation, social tolerance and domestication also influenced how dogs bark, whine and howl.
How the research works
At the Budapest BARKS Lab, dogs take part in short, voluntary sessions designed to trigger different emotional states. They play, solve simple tasks, experience brief separations from their owners and respond to unusual objects. Researchers record each sound alongside behavior and heart rate to map how vocalizations connect to emotion.
The next step is testing whether dogs can produce sounds on cue. The goal is not to make them "speak" like humans, but to measure how much deliberate control they have over their voices -- including the ability to vocalize or stay quiet when asked.
Dr Sára Sándor, who helps design the training, says the process is built around consent and comfort, with dogs free to stop whenever they choose. The project will soon expand beyond the lab, inviting dog owners in Budapest and around the world to contribute recordings, behavior data and DNA samples.
Beyond its value for evolutionary science, the work could also support future tools that interpret canine emotions through sound. That could help people understand their pets more clearly and strengthen everyday human-animal communication. In the long run, studies like this may reveal how cooperation and vocal flexibility shaped both dogs and the human voice.
