The Implication of Sound Level on Spatial Selective Auditory Attention for Cochlear Implant Users: Behavioral and Electrophysiological Measurement

Sara Akbarzadeh, Sungmin Lee, Chin-Tuan Tan


This study investigated the effect of sound level on the spatial selective auditory attention of Normal Hearing (NH) and Cochlear Implant (CI) listeners behaviorally and electrophysiologically. Three spatially separated speech streams consisting of one target and two maskers were presented to the subjects. While keeping the same target to masker ratio, the target stimuli were presented at three different sound levels. In the behavioral test, subjects were instructed to attend the target speech, and speech perception score was calculated based on correctly recognized words in percentage. In the electrophysiological test, electroencephalography (EEG) signals were recorded while the subjects were listening for target speech in the presence of two maskers. The attended speech envelope was reconstructed from EEG using a linear regression model. The spatial auditory attention was detected through comparison of the reconstructed speech envelope with the original envelopes associated with the three speech streams presented. Outcome of both behavioral and electrophysiological experiments showed that an increase in the sound level decreases the spatial speech recognition performance of CI listeners, but not NH listeners.


 DOI: 10.21437/Interspeech.2020-2836

Cite as: Akbarzadeh, S., Lee, S., Tan, C. (2020) The Implication of Sound Level on Spatial Selective Auditory Attention for Cochlear Implant Users: Behavioral and Electrophysiological Measurement. Proc. Interspeech 2020, 2497-2501, DOI: 10.21437/Interspeech.2020-2836.


@inproceedings{Akbarzadeh2020,
  author={Sara Akbarzadeh and Sungmin Lee and Chin-Tuan Tan},
  title={{The Implication of Sound Level on Spatial Selective Auditory Attention for Cochlear Implant Users: Behavioral and Electrophysiological Measurement}},
  year=2020,
  booktitle={Proc. Interspeech 2020},
  pages={2497--2501},
  doi={10.21437/Interspeech.2020-2836},
  url={http://dx.doi.org/10.21437/Interspeech.2020-2836}
}