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Modeling the Functional Network for Spatial Navigation in the Human Brain
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Defining functional spatial boundaries using a spatial release from masking task.

Erol J Ozmeral1, Nathan C Higgins1

  • 1Department of Communication Sciences and Disorders, University of South Florida, Tampa, Florida 33620, USA eozmeral@usf.edu, higgins1@usf.edu.

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|December 31, 2022
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Summary
This summary is machine-generated.

This study adapted the spatial release from masking (SRM) task to find the needed spatial separation for speech recognition. Less separation was required for a 6 dB release compared to 9 dB, with babble reducing listener variability.

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Area of Science:

  • Auditory perception
  • Speech processing
  • Psychoacoustics

Background:

  • The classic spatial release from masking (SRM) task uses discrete angles to assess speech recognition.
  • Understanding auditory spatial processing is crucial for speech intelligibility in complex environments.

Purpose of the Study:

  • To adapt the SRM task for continuous measurement of spatial separation.
  • To determine the spatial separation needed for specific speech recognition improvements.

Main Methods:

  • A modified adaptive SRM task was employed.
  • Measured spatial-separation angle between a continuous male speech target and two female masker streams.
  • Utilized a target speech with digits and background babble.

Main Results:

  • Young, normal-hearing listeners required less spatial separation for a 6 dB speech release than for a 9 dB release.
  • The inclusion of background babble decreased listener variability in the adaptive SRM paradigm.

Conclusions:

  • The adaptive SRM procedure provides a viable method for measuring spatial hearing abilities.
  • Further research is necessary to fully characterize the psychometric properties of this adaptive approach for spatial release from masking.