Computational mathematics model of Passive spiral cochlea

The ear is an important sensory organ of the human body. Cochlea has a pivotal role in hearing system human. Nearly 300 million people around world suffer from sensorineural deafness caused by cochlear lesions. Because mechanism sensing very complex, it not been understood completely so far, which become one problems medicine today. basilar membrane canal supporting structure all microstructures, complex coupling motion between and lymph primary condition for generating sound function. Therefore, essential to study dynamic behavior basement membranes. By dividing length cochlea into finite number elements giving radial distribution, set governing equations derived micromechanics with fluid. Then combining these matrix combination equation, complete response obtained. instantaneous responses under different excitations, time domain resonance position frequency effects changes mass stiffness on its biomechanical properties function are analyzed. results showthat increase leads weakening maximum response, causes move bottom membrane; top changing cross-section can rapidly reduce characteristic frequencies at middle cochlea, thus achieving better filtering amplification specific excitation, enabling have higher resolution range 1000–3000 Hz.This computational mathematics model provide numerical analysis platform implementing clinical evaluation lesions inner ear. Compared existing element models, this method faster calculation speed efficiency parameter analysis.