Acoustic enhancement of electrically evoked otoacoustic emissions reflects basilar membrane tuning: a model.
A simple model for the acoustic enhancement of electrically evoked otoacoustic emissions (EEOEs) is presented in this paper. The model is based on the assumption that the enhancement is a result of the local interaction between the electrical current spreading in the scala media and the basilar membrane (BM) response to acoustic input. The analytical, steady-state response of the 1-dimensional linear cable to sinusoidal current injection is derived and is used to predict the current spreading in the cochlea. Acoustic enhancement at an emission generator is modeled as a magnitude change that is a sigmoid function of the local BM motion. The model results are in good agreement with the experimental findings and support our interpretation that the acoustic enhancement of EEOEs reflects BM tuning.
Xue
S
S
Division of Otolaryngology-Head and Neck Surgery, Duke University Medical Center, Durham, NC 27710, USA. sx@dukehrl.mc.duke.edu
Mountain
D C
DC
Hubbard
A E
AE
D000161:Acoustic Stimulation; D000818:Animals; D001489:Basilar Membrane / Q000378:metabolism / Q000502:physiology*; D003051:Cochlea / Q000378:metabolism / Q000502:physiology; D003053:Cochlear Duct / Q000378:metabolism / Q000502:physiology; D003198:Computer Simulation; D004558:Electric Stimulation; D005849:Gerbillinae; D006168:Guinea Pigs; D018072:Hair Cells, Auditory, Outer / Q000166:cytology / Q000502:physiology; D008954:Models, Biological; D017084:Otoacoustic Emissions, Spontaneous