Benjamin James Kirby

Learn More
OBJECTIVES The goals of this study were (1) to describe the relationship between electrically evoked compound action potential (ECAP) and electrically evoked auditory brainstem response (EABR) amplitude growth functions and loudness growth functions in bilateral cochlear implant (CI) users, and (2) to determine whether matching the stimulus levels in the(More)
OBJECTIVES To determine whether an "optimal" distortion product otoacoustic emission (DPOAE) protocol that (1) used optimal stimulus levels and primary-frequency ratios for each f2, (2) simultaneously measured 2f2 - f1 and 2f1 - f2 distortion products, (3) controlled source contribution, (4) implemented improved calibration techniques, (5) accounted for the(More)
BACKGROUND Children who wear hearing aids may be at risk for further damage to their hearing from overamplification. Previous research on amplification-induced hearing loss has included children using linear amplification or simulations of predicted threshold shifts based on nonlinear amplification formulae. A relationship between threshold shifts and the(More)
OBJECTIVES Nonlinear frequency compression is a signal processing technique used to increase the audibility of high-frequency speech sounds for hearing aid users with sloping, high-frequency hearing loss. However, excessive compression ratios may reduce spectral contrast between sounds and negatively impact speech perception. This is of particular concern(More)
Summer 2014-present Responsibilities: Designed and conducted experiments examining the development of supra-threshold listening performance in children who are normal hearing and children who are hard of hearing. Responsibilities: Taught lecture and lab sections on basic clinical electrophysiology theory and practice. Responsibilities: Measured distortion(More)
OBJECTIVE We examined how cognitive and linguistic skills affect speech recognition in noise for children with normal hearing. Children with better working memory and language abilities were expected to have better speech recognition in noise than peers with poorer skills in these domains. DESIGN As part of a prospective, cross-sectional study, children(More)
OBJECTIVES Nucleus Hybrid Cochlear Implant (CI) users hear low-frequency sounds via acoustic stimulation and high-frequency sounds via electrical stimulation. This within-subject study compares three different methods of coordinating programming of the acoustic and electrical components of the Hybrid device. Speech perception and cortical auditory evoked(More)
Children's performance on psychophysical tasks improves with age. The relationship of spectro-temporal modulation detection to age, particularly in children who are hard of hearing, is not well-established. In this study, children with normal hearing (N = 22) and with sensorineural hearing loss (N = 15) completed measures of spectro-temporal modulation(More)
iii First say to yourself what you would be; and then do what you have to do. provided invaluable technical assistance without which this work could not have been completed. Many thanks are owed to my family and friends. v ABSTRACT Nonlinear frequency compression is a signal processing technique used to increase the audibility of high frequency speech(More)
  • 1