An Ear for Tiny Sound Differences May Help Adults Learn New Languages

Adults with a keen ear for subtle sound differences may find it easier to learn new languages, according to a study from UCL and Tohoku University. The ability, known as auditory precision, refers to how well a person can distinguish fine variations in sound. A brain scan revealed that learners with higher auditory precision demonstrated less activity in speech-related brain regions when they encountered unfamiliar vowels.

This may indicate that they rely more on the acoustic characteristics of sounds themselves, rather than the language patterns they have learned, leading to more objective recognition of new language sounds. In a listening test, Japanese learners of English were given three tones with a barely perceptible difference in sound frequencies used to distinguish vowels.

Those with superior auditory precision were better at identifying the odd tone, which was similar to the differences they were later taught to recognize in English vowel pairs like "mad" and "mud." A second group of 67 college students in Sendai showed the same correlation between auditory precision and vowel identification. Even after accounting for language-learning experience, such as classes and pronunciation training, auditory precision remained linked to the learners' ability to differentiate English vowels.

This suggests that practicing listening exercises could help learners better detect subtle language sounds, potentially improving their overall language acquisition.