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Individual Auditory Categorization Abilities Are Shaped By Intrinsic And Experience-Driven Neural Factors, Kelsey Mankel
Individual Auditory Categorization Abilities Are Shaped By Intrinsic And Experience-Driven Neural Factors, Kelsey Mankel
Electronic Theses and Dissertations
To make sense of the auditory world, listeners must organize diverse, continuously varying sounds into meaningful perceptual categories. The auditory categorization process is believed to be a foundational skill for language development and speech perception. Despite decades of behavioral research, neuroscientific evidence is only beginning to uncover where, when, and how auditory categories arise in the brain. Although it has been proposed that categorical perception is shaped by both innate (nature) and experience-driven (nurture) factors, it is unclear how these features manifest neurally at the individual level. In the first study of this dissertation, we recorded multi-channel electroencephalography (EEG) in …
Predicting Speech Recognition Using The Speech Intelligibility Index (Sii) For Cochlear Implant Users And Listeners With Normal Hearing, Sung Min Lee
Electronic Theses and Dissertations
Although the AzBio test is well validated, has effective standardization data available, and is highly recommended for Cochlear Implant (CI) evaluation, no attempt has been made to derive a Frequency Importance Function (FIF) for its stimuli. In the first phase of this dissertation, we derived FIFs for the AzBio sentence lists using listeners with normal hearing. Traditional procedures described in studies by Studebaker and Sherbecoe (1991) were applied for this purpose. Fifteen participants with normal hearing listened to a large number of AzBio sentences that were high- and low-pass filtered under speech-spectrum shaped noise at various signal-to-noise ratios. Frequency weights …