The auditory system tracks moving noises

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The auditory system tracks moving sounds < img src ="https://scx1.b-cdn.net/csz/news/800a/2021/theauditorys.jpg"alt=" The acoustic system tracks moving noises"width= "750"height="423"/ > Projected model fits for a single individual. The thin curves reveal the results for each trial, color coded by trial number. The black strong lines correspond to the typical transfer characteristic throughout trials. Note the methodical change of the gain and phase attributes with trial number. Credit: García-Uceda Calvo et al., eNeuro 2021

The brain’s acoustic system tracks the speed and place of moving sounds in the very same way the visual system tracks moving objects. The research study recently released in eNeuro prepares for more detailed research on how people hear in dynamic environments.

People who utilize hearing aids have difficulty discriminating noises in hectic environments. Understanding if and how the auditory system tracks moving noises is important to improving listening devices innovation. Prior research making use of eye movements to assess whether the brain is following the trajectory of a moving noise shows it can not. A new study from García-Uceda Calvo et al. instead used head motions, a more precise measure of sound tracking.

The team analyzed head movements of hearing individuals as they tracked randomly moving noises in a dark room. Their analysis revealed human beings follow moving noises, with excellent precision. The auditory system actively tracks the velocity of a sound, much like the visual system, instead of modifications in position. The participants enhanced their sound tracking ability over the course of the experiment, a sign the acoustic system was detecting hidden patterns in the sound trajectories and making forecasts.

These results show the brain possess cells and circuits devoted to tracking the velocity of noises.

Visual cues amplify sound More info: Adaptive Action Behavior in the Pursuit of Unpredictably Moving Sounds, eNeuro, DOI: 10.1523/ ENEURO.0556-20.2021 Provided by Society for Neuroscience

Citation: The auditory system tracks moving sounds (2021, April 19) obtained 20 April 2021 from https://medicalxpress.com/news/2021-04-auditory-tracks.html

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