Introduction to Cochlear Waves (eBook)

Reinhart Frosch (Autor)

eBook Download: PDF

2010 | 1. Auflage
446 Seiten
vdf Hochschulverlag AG
978-3-7281-3354-0 (ISBN)

Infos

Most of the present text is devoted to a «passive» cochlea, i.e., to cases in which the mechanical energy generated by «active» outer hair cells is absent or negligibly small. In spite of the fact that a part of the travelling wave energy is transformed into frictional heat, the velocity amplitude of the basilar-membrane oscillation increases with increasing distance from base.



At some place, namely at the «passive peak» that increase stops, and at greater distance from base, the amplitude quickly drops to small values. At high [low] sine-tone frequency, the distance from base of the passive peak is short [long]. That travelling cochlear wave is the main topic of the present text.

Inhalt

Preface 11
Contents 13
1 Structure of the Mammalian Cochlea 17
PART ONE: GRAVITATIONAL LIQUID-SURFACE WAVES 23
2 Introduction to Gravitational Liquid-Surface Waves 25
3 Wave Groups 39
4 Tsunamis 49
5 Mass-Loaded Gravitational Surface Waves 53
PART TWO: MASS-LOADED LIQUID-SURFACE WAVES WITH SPRING RESTORING FORCE 61
6 Introduction to Mass-Loaded Liquid-Surface Waves with Spring Restoring Force 63
7 Liquid on Both Sides of Cochlear Partition 67
8 Liquid Pressure 71
PART THREE: COMPLEX WAVE FUNCTIONS 77
9 Introduction to Complex Wave Functions 79
10 The Impedance of the Basilar Membrane 85
11 Resonance 97
12 Resonance (Continued) 107
PART FOUR: LONG-WAVE FORMULAE 113
13 TW Liquid Pressure versus x and z in Two-Dimensional Cochlear Models 115
14 The Motion of the Stapes 121
15 The Liouville-Green Approximation 129
16 Exponentially Decreasing BM Stiffness Negligible Mass and Friction
17 A Different Basilar-Membrane Stiffness Function 147
PART FIVE: SHORT-WAVE FORMULAE 157
18 Validity Regions of Long- and Short-Wave Approximations 159
19 Short-Wave Liquid-Pressure Functions 171
20 Short-Wave Basilar-Membrane-Velocity Functions 181
21 Comparison with Experiments 193
PART SIX: EVANESCENT WAVES 199
22 Evanescent Cochlear Waves without Friction 201
23 Evanescent Cochlear Waves with Friction 215
24 Travelling Evanescent Cochlear Waves 227
25 Finite-Element Analysis 239
PART SEVEN: HIGH-FREQUENCY PHENOMENA 283
27 Liquid-Sound-Pressure Zeroes 285
28 High-Frequency Plateaux 293
PART EIGHT: LIQUID COMPRESSION WAVES 307
29 Plane Liquid Compression Waves in Straight Tubes 309
30 The Input Impedance 319
32 Helmholtz Resonators (Continued) 329
PART NINE: OLD AND NEW COCHLEAR MAPS 333
33 The Passive-Peak Map 335
34 The Basilar-Membrane Resonator Map 341
35 The Internal Organ-of-Corti Resonator Map and the Low-Level Active-Peak Map 343
36 Forced IOCR Oscillations 349
37 Resonators with Feedback 357
38 Guinea-Pig Maps 365
39 Chinchilla Maps 373
40 Mongolian-Gerbil Maps 381
41 Human Maps 385
PART TEN: OTO-ACOUSTIC EMISSIONS AND FREQUENCY GLIDES 389
42 Distortion-Product Emissions 391
43 Quadratic and Cubic Difference Tones 405
44 Click-Evoked Oto-Acoustic Emissions 413
45 Frequency Glides 429
References 441
Index 447

Produkt-Details

• Erscheint lt. Verlag: 1.1.2010
• Sprache: englisch
• Themenwelt: Medizinische Fachgebiete ► Innere Medizin ► Pneumologie
• ISBN-10: 3-7281-3354-X / 372813354X
• ISBN-13: 978-3-7281-3354-0 / 9783728133540