Impedance and electromechanical vibration measured in the organ of Corti up to 50 kHz [Elektronische Ressource] : new insights for cochlear amplification / vorgelegt von Marc Philippe Scherer

Impedance and Electromechanical VibrationMeasured in the Organ of Corti up to 50 kHz:New Insights for Cochlear AmplificationDissertationzur Erlangung des Grades eines Doktorsder Naturwissenschaftender Fakultät für Mathematik und Physikder Eberhard-Karls-Universität zu Tübingenvorgelegt vonMarc Philippe Schereraus Tettnang2005Tag der mündlichen Prüfung: 4. Oktober 2005Dekan: Prof. Dr. P. Schmid1. Berichterstatter: Prof. Dr. A.W. Gummer/Prof. Dr. H. Ruder2. Berichterstatter: Prof. Dr. D. Kern3. Berichterstatter: Prof. Dr. Ch. SteeleContentsList of abbreviations 1Summary 31 Introduction 51.1 Motivation ................................... 51.2 Signal processing capabilities of the ear . . . . . . . . . . . . . . . . . . . 51.2.1 Sensitivity................................ 61.2.2 Frequencyresolution.......................... 61.2.3 Intensityresolution........................... 71.2.4 Temporalresolution.......................... 71.3 Anatomyoftheinnerear–thecochlea.................... 71.3.1 GeneralAnatomy............................ 81.3.2 Cochlearpartition........................... 101.4 Stateoftheart................................. 111.5 Purposeofthisstudy.............................. 142Methods 172.1 Animalpreparation............................... 172.2 Signalprocesing................................ 172.3 Velocitymeasurement............................. 202.4 Theoryofatomicforcecantileversinfluid.................. 202.4.