Emanations from Residuum Oscillations in Human Auditory System

The human auditory system is divided into three main parts: outer, middle and inner auditory system. The auditory system is mainly responsible for hearing and balance. The Cochlea, which is present in the inner auditory system, consists of Basilar Membrane, Organ of Corti, OHC and IHC together execute the hearing mechanism. Otoacoustic Emissions are inaudible sounds which come out from the inner auditory system. These are produced due to Cochlear amplification wherein OHCs play an important role by providing electro-mechanical positive feedback. OAEs are mainly used for diagnosis of hearing sensitivity in new-born babies and adults. They are not produced for persons having hearing disabilities more than 25 -30 dB. The OAEs are classified into Spontaneous and Evoked types. The main objective of this project is to generate Transient-Evoked and SustainedFrequency OAEs by simulating a human inner auditory system model. The basic underlying principle of modeling the human inner auditory system used in this project is Hydrodyamics. Hydrodynamics is the study of motion of incompressible and compressible fluids. The incompressible fluids present inside the cochlea, Endolymph and Perilymph, are responsible for the movement of the BM.. Keyword-OHC,IHC,Baislar Membrane,OAE,Hydrodynamic model