TY - GEN
T1 - Mathematically Modelling the Brain Response to Auditory Stimulus
AU - Miles, Thimothy
AU - Ignatious, Eva
AU - Azam, Sami
AU - Jonkman, Mirjam
AU - De Boer, Friso
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/12
Y1 - 2021/12
N2 - The research involves the study of auditory-evoked potentials (AEPs) recorded using electroencephalography (EEG) from human subjects. The study aims to mathematically model how the brain responds to the audio stimulus, which involves the identification of differences in the AEPs by simulating binaural hearing. This is achieved by transmitting auditory stimulus in-phase in both ears, and tones which are 180 degrees out of phase in each ear. The study creates a range of models with the aim to determine the type and order of the models which provide the best fit to the AEPs, and to analyze the differences between the homo-phasic and anti-phasic models. The work discovered that multi-input single-output (MISO) transfer function models are able to fit the AEPs. Tenth-order models provide optimal mathematical fit; these models produced significantly greater fit than lower order models while higher order models produce minimal improvement. The addition of zeros also produced insignificant improvement upon the mathematical fit. About 75-95% of mathematical fits were achieved across all subjects. Analysis of the pole-zero plots suggest that the pole pairs with frequencies greater than 125 rad/s are more damped for the trials using homo-phasic auditory stimulus compared with models generated for trials using anti-phasic stimulus. This suggests that if the brain is processing binaural hearing, then the high-frequency poles in 10-pole MISO transfer functions should have low damping.
AB - The research involves the study of auditory-evoked potentials (AEPs) recorded using electroencephalography (EEG) from human subjects. The study aims to mathematically model how the brain responds to the audio stimulus, which involves the identification of differences in the AEPs by simulating binaural hearing. This is achieved by transmitting auditory stimulus in-phase in both ears, and tones which are 180 degrees out of phase in each ear. The study creates a range of models with the aim to determine the type and order of the models which provide the best fit to the AEPs, and to analyze the differences between the homo-phasic and anti-phasic models. The work discovered that multi-input single-output (MISO) transfer function models are able to fit the AEPs. Tenth-order models provide optimal mathematical fit; these models produced significantly greater fit than lower order models while higher order models produce minimal improvement. The addition of zeros also produced insignificant improvement upon the mathematical fit. About 75-95% of mathematical fits were achieved across all subjects. Analysis of the pole-zero plots suggest that the pole pairs with frequencies greater than 125 rad/s are more damped for the trials using homo-phasic auditory stimulus compared with models generated for trials using anti-phasic stimulus. This suggests that if the brain is processing binaural hearing, then the high-frequency poles in 10-pole MISO transfer functions should have low damping.
KW - Auditory-evoked-potentials (AEPs)
KW - electroencephalogram (EEG)
KW - hearing tests
KW - mathematical modelling
KW - pole-zero plots
UR - http://www.scopus.com/inward/record.url?scp=85125966343&partnerID=8YFLogxK
U2 - 10.1109/TENCON54134.2021.9707290
DO - 10.1109/TENCON54134.2021.9707290
M3 - Conference Paper published in Proceedings
AN - SCOPUS:85125966343
T3 - IEEE Region 10 Annual International Conference, Proceedings/TENCON
SP - 151
EP - 156
BT - TENCON 2021 - 2021 IEEE Region 10 Conference
PB - IEEE, Institute of Electrical and Electronics Engineers
CY - Piscataway, New Jersey
T2 - 2021 IEEE Region 10 Conference, TENCON 2021
Y2 - 7 December 2021 through 10 December 2021
ER -