TY - GEN
T1 - Using functional near infrared spectroscopy to assess auditory responses in auditory and lateral frontal cortex
AU - Zhang, Min
AU - Ihlefeld, Antje
N1 - Publisher Copyright:
© 2019 Proceedings of the International Congress on Acoustics. All rights reserved.
PY - 2019
Y1 - 2019
N2 - A growing literature reveals that brain mechanisms contribute to symptoms of hearing loss. To study how hearing loss affects brain function, several groups including our own have developed light-based methods via functional near-infrared spectroscopy (fNIRS). Using fNIRS, we recently confirmed that lateral frontal cortex (LFC) engages when normal-hearing listeners direct attention to words in background sound versus listen passively. We now test how sensory resolution affects LFC recruitment. As a control, we also record over auditory cortex (AC). Using simulated cochlear implant speech, we ask listeners to perform a word detection task in a situation with competing background speech, as a function of the amount of sensory detail in the cochlear implant simulation. One possibility is that impoverished sensory cues reduce AC or LFC engagement, as compared to high-fidelity cues, limiting the potential usefulness auditory attention. Alternatively, poorly resolved sensory detail may increase AC or LFC engagement, causing it to saturate and limiting overall speech intelligibility. Recruitment of AC and LFC will be discussed in context of the saturation hypothesis.
AB - A growing literature reveals that brain mechanisms contribute to symptoms of hearing loss. To study how hearing loss affects brain function, several groups including our own have developed light-based methods via functional near-infrared spectroscopy (fNIRS). Using fNIRS, we recently confirmed that lateral frontal cortex (LFC) engages when normal-hearing listeners direct attention to words in background sound versus listen passively. We now test how sensory resolution affects LFC recruitment. As a control, we also record over auditory cortex (AC). Using simulated cochlear implant speech, we ask listeners to perform a word detection task in a situation with competing background speech, as a function of the amount of sensory detail in the cochlear implant simulation. One possibility is that impoverished sensory cues reduce AC or LFC engagement, as compared to high-fidelity cues, limiting the potential usefulness auditory attention. Alternatively, poorly resolved sensory detail may increase AC or LFC engagement, causing it to saturate and limiting overall speech intelligibility. Recruitment of AC and LFC will be discussed in context of the saturation hypothesis.
KW - Cochlear implant
KW - Functional near infrared spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85099330238&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85099330238&partnerID=8YFLogxK
U2 - 10.18154/RWTH-CONV-239916
DO - 10.18154/RWTH-CONV-239916
M3 - Conference contribution
AN - SCOPUS:85099330238
T3 - Proceedings of the International Congress on Acoustics
SP - 5659
EP - 5663
BT - Proceedings of the 23rd International Congress on Acoustics
A2 - Ochmann, Martin
A2 - Michael, Vorlander
A2 - Fels, Janina
PB - International Commission for Acoustics (ICA)
T2 - 23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019
Y2 - 9 September 2019 through 23 September 2019
ER -