Medindia

X

Find Out Why You can Focus on One Conversation Amidst Noise

by Hannah Punitha on  March 6, 2008 at 8:39 PM Environmental Health   - G J E 4
Find Out Why You can Focus on One Conversation Amidst Noise
Cutting through the chatter for understanding a conversation in a noisy cocktail party is a gift given to humans, say researchers.
Advertisement

Scientists call this ability to listen to someone speaking while many others are talking loudly at the same time the cocktail-party-phenomenon and it stems from how the brain distinguishes the pitch of different voices.

Advertisement
It was thought for a long time that the direction where the sounds came from was the key to doing this.

Now, the latest study, led by Holger Schulze at the Leibniz-Institute for Neurobiology in Magdeburg, and the Universities of Ulm, Newcastle and Erlangen have found a neuronal mechanism in the auditory system that is able to solve the task based on the analysis of the temporal fine structure of the acoustic scene.

The findings show that different speakers have different temporal fine structure in their voiced speech and that such signals are represented in different areas of the auditory cortex according to this different time structure.

By means of a so-called winner-take-all algorithm, one of these representations gains control over all other representations.

This implies that only the voice of the speaker to whom you wish to listen is still represented in the auditory cortex and can thus be followed over time.

This predominance of the representation of one speaker's voice over the representations of all other speakers is achieved by long-range inhibitory interactions that are first described by Schulze and colleagues using functional neurophysiological, pharmacological and anatomical methods.

The results of the study provide a deeper understanding of how the parcellation of sensory input into perceptually distinct objects is realized in the brain, and may help to improve the auditory experience of hearing aid wearers at cocktail parties.

Source: ANI
SPH /G
Advertisement

Post your Comments

Comments should be on the topic and should not be abusive. The editorial team reserves the right to review and moderate the comments posted on the site.
User Avatar
* Your comment can be maximum of 2500 characters
Notify me when reply is posted I agree to the terms and conditions

You May Also Like

Advertisement
View All