![]() "It's a tendency to guess accurately the way things are probably going to happen." These rules include predicting what we're about to hear, biased by experience. These auditory illusions are side-effects of adaptations that solve a critical problem.Įngineering Psychologist Michael McBeath leads ASU’s Perception, Ecological Action, Robotics & Learning Lab. It's not combining acoustically in the air it's happening inside our head," said Story. Similarly, two different sounds, one played in each ear, can trick the brainstem into hearing a rhythmic "beat." Two intense tones can produce an illusory "combination" tone, also known as a Tartini tone, that sounds real but exists only in the cochlea. "Then when you have a big disturbance in a certain part of it, the hair cells and the auditory nerves that are associated with them are excited." ![]() Story says that, because the cochlea grows narrower and stiffer as it spirals inward, parts of it vibrate at different frequencies. "The cochlea is really the place, the initial spectral analysis of the sound," said Brad Story, a professor of speech, language and hearing sciences at the University of Arizona specializing in computational models of speech production. "Our perceptions of the world are just as much guided by our expectations and experiences as they are by the physical energy coming into our brain," she said.Ĭonsequently, illusions can occur within the inner ear, starting with the cochlea. In other words, hearing is about what we pay attention to, and what we expect to hear. Visual diagram of the ear, including the cochlea in purple.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |