A new study published today in Science reveals a surprising degree of overlap in acoustic preferences between humans and a variety of animal species, including insects, bats, and frogs. Researchers at The University of Texas at Austin and collaborating institutions found that people consistently favored certain variations of mating calls across 16 different species, mirroring preferences exhibited by the animals themselves.
The research involved citizen scientists who participated in an online computer game, “Call of the Wild,” where they listened to pairs of mating sounds and selected their preferred choice. The study focused on identifying whether human aesthetic sensibilities aligned with those driving mate selection in the animal kingdom. “This makes a lot of sense, because as the nervous systems and auditory systems of animals evolved, many of the same basic features were conserved,” explained Michael Ryan, Clark Hubbs Regents Professor in Zoology in UT’s Department of Integrative Biology.
The findings suggest that fundamental neurological similarities may underpin these shared preferences. “There are important differences, but a neuron is a neuron, whichever animal you identify it in. So it’s not too surprising that these sounds are sweet to our ears, as well,” Ryan added. Researchers noted that the study doesn’t necessarily imply animals are consciously crafting calls to appeal to human ears, but rather that the acoustic features deemed attractive by both humans and animals likely serve a common evolutionary purpose.
The study builds on decades of research into animal communication, which has increasingly demonstrated the complexity and intentionality of signals exchanged within and between species. Scientists have observed wild birds adapting their calls to overcome urban noise pollution, indicating a capacity for learning and plasticity in vocal communication. This adaptability hints at a cognitive foundation that may be related to the development of human language, according to recent research.
The phenomenon of vocal mimicry is also well-documented, particularly among birds. Budgies, a type of parakeet, are known for their ability to learn and reproduce human speech, sometimes even forming original phrases. Timothy Wright, an associate professor of biology at New Mexico State University, notes that even as some birds “talk” within their own species to convey information like predator warnings or mating signals, others, like parrots, mimic sounds from other species – including humans – for social bonding and survival.
The research team intends to continue exploring the neurological basis for these shared acoustic preferences, with a focus on identifying the specific features of mating calls that trigger positive responses in both humans and animals. Further studies are planned to investigate whether these preferences extend to other sensory modalities, such as visual displays and olfactory signals.
Leave a Reply