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Decoding spatial attention with EEG and virtual acoustic space
| Content Provider | Semantic Scholar |
|---|---|
| Author | Dong, Yue Raif, Kaan E. Determan, Sarah C. Gai, Yan |
| Copyright Year | 2017 |
| Abstract | Decoding spatial attention based on brain signals has wide applications in brain-computer interface (BCI). Previous BCI systems mostly relied on visual patterns or auditory stimulation (e.g., loudspeakers) to evoke synchronous brain signals. There would be difficulties to cover a large range of spatial locations with such a stimulation protocol. The present study explored the possibility of using virtual acoustic space and a visual-auditory matching paradigm to overcome this issue. The technique has the flexibility of generating sound stimulation from virtually any spatial location. Brain signals of eight human subjects were obtained with a 32-channel Electroencephalogram (EEG). Two amplitude-modulated noise or speech sentences carrying distinct spatial information were presented concurrently. Each sound source was tagged with a unique modulation phase so that the phase of the recorded EEG signals indicated the sound being attended to. The phase-tagged sound was further filtered with head-related transfer functions to create the sense of virtual space. Subjects were required to pay attention to the sound source that best matched the location of a visual target. For all the subjects, the phase of a single sound could be accurately reflected over the majority of electrodes based on EEG responses of 90 s or less. The electrodes providing significant decoding performance on auditory attention were fewer and may require longer EEG responses. The reliability and efficiency of decoding with a single electrode varied with subjects. Overall, the virtual acoustic space protocol has the potential of being used in practical BCI systems. |
| Starting Page | 42 |
| Ending Page | 47 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| PubMed reference number | 29180483v1 |
| Alternate Webpage(s) | https://doi.org/10.14814/phy2.13512 |
| DOI | 10.14814/phy2.13512 |
| Journal | Physiological reports |
| Volume Number | 5 |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Acoustic Stimulation Auditory Perceptual Disorders Brain Neoplasms Brain-Computer Interfaces Electroencephalography Hearing problem Interface Device Component Tracer electrode sentence |
| Content Type | Text |
| Resource Type | Article |
