**Meet the editors**

Dr Cila Umat is an Associate Professor and Head of the Audiology Program at the School of Rehabilitation Sciences, Faculty of Health Sciences, Universiti Kebangsaan Malaysia (UKM) Kuala Lumpur, Malaysia. She obtained her first degree in Physics from UKM in 1993, Postgraduate Diploma of Audiology and Masters of Audiology from Macquarie University, Sydney, Australia in

1995 and 1996, respectively. She went on to do her doctorate study at the University of Melbourne in the area of cochlear implant psychophysics in 2002 and obtained her PhD in 2005. She is the first audiologist in Malaysia to obtain her PhD degree in audiology. Associate Professor Dr Cila Umat has worked as a lecturer and audiologist in UKM since 1996 after finishing her Master degree. She has also been appointed as the Head of the Audiology & Speech Sciences Department, the UKM Audiology Program Coordinator and she currently holds position as the Head of the Audiology Program at UKM. Her research interest is in the area of cochlear implantation especially on auditory perception through the cochlear implant device. Associate Professor Dr. Cila Umat has been in the UKM Cochlear Implant Team since 1997. The UKM Cochlear Implant Program which started in 1995 is the first and the largest Cochlear Implant program in Malaysia.

Dr Rinze Anthony Tange was born on 8 January 1950 in Utrecht, the Netherlands. He studied medicine at the Utrecht University where he graduated in 1976 and became specialist in otolaryngology at the Erasmus University in Rotterdam. In 1981 Dr Tange moved from Rotterdam to the ENT department of the University of Amsterdam. In 1983 he published his thesis "Degenera-

tive ototoxic changes in the cochlea as seen in microdissections and surface preparations". The thesis was awarded with two prizes. On 4 September 1996 Dr Tange was appointed associate professor (UHD) at Universiteit van Amsterdam. In 2001 he founded the cochlear implant team of Amsterdam. He introduced an innovative non-invasive surgical approach to implant the cochlea implants. Almost 300 implantations have been performed up until now. Dr Tange has published over 170 papers of which more than 80 are cited. He has been the founder of the Dutch Journal of Otolaryngology and co-founder member of European Academy of Otology and Neurotology (EAONO). In 2003 he organized the 24th Politzer Society Meeting in Amsterdam. Dr Tange is a co-founder member of the LION project a Global Visio conference Network for Otolaryngology. In 2009 he was invited to join the ENT department of Utrecht University.

Contents

**Preface IX** 

**Section 1 Surgical Techniques 1** 

R.A. Tange

Chapter 1 **Cochlear Implant Surgery 3** 

and Marlan R. Hansen

**Section 2 Speech Processing Strategies 37** 

Chapter 3 **Wavelet Based Speech Strategy in Cochlear Implant 39**  Gulden Kokturk

Chapter 4 **Strategies to Improve Music Perception in Cochlear Implantees 59**  Joshua Kuang-Chao Chen,

Chapter 5 **A Review of Stimulating Strategies for Cochlear Implants 77** 

Charles T. M. Choi and Yi-Hsuan Lee

Clemens Zierhofer and Reinhold Schatzer

**Human and Machine Hearing Research 117** 

Chapter 6 **A Fine Structure Stimulation Strategy and** 

Chapter 7 **Acoustic Simulations of Cochlear Implants in** 

**Related Concepts 91** 

**Section 3 Other Research Updates 115** 

Cong-Thanh Do

Catherine McMahon and Lieber Po-Hung Li

Hakan Soken, Sarah E. Mowry

Chapter 2 **Modifications on the Alternative Method for Cochlea Implantation 23** 

## Contents

#### **Preface XI**


Chapter 7 **Acoustic Simulations of Cochlear Implants in Human and Machine Hearing Research 117**  Cong-Thanh Do


## Preface

For many years or decades, cochlear implants have been an exciting research area covering multiple disciplines which include otology, engineering, audiology, speech language pathology, education and psychology, among others. Through these research studies, we have started to learn or have better understanding on various aspects of cochlear implant surgery and what follows after the surgery, the implant technology and other related aspects of cochlear implantation. Some are much better than the others but nevertheless, many are yet to be learnt. This book is intended to fill up some gaps in cochlear implant research studies. The compilation of the studies cover a fairly wide range of topics including surgical issues, some basic auditory research, studies to improve the speech or sound processing strategies used in cochlear implants, some ethical issues in language development and cochlear implantation in cases with auditory neuropathy spectrum disorder. The book is meant for postgraduate students, researchers and clinicians in the field to get some updates in their respective areas.

To all the contributing authors, your efforts and patience are very much appreciated. We consider that one of the uniqueness of this publication is that the contributing authors are people who are experts and renowned in their fields. We have learned a lot throughout this whole process of involvement as book editors, just by reading and commenting on these superb-written chapters.

We changed the earlier book title to *'Cochlear Implant Research Updates'* to better define or reflect its content. In facilitating the expected diverse readers of this book, we have divided it into three sections: *Surgical Techniques, Speech Processing Strategies,* and *Other Research Updates.* We hope the readers will find the chapters in the book as much interesting and informative as we personally have. They are stimulating new findings and hold for the future of improving the technology, and better understanding of how the users hear through the cochlear implant device. One of the studies also discusses on the contra aspect of what we generally believe on the usefulness of the cochlear implant technology in facilitating speech and language development of young children with severe and profound hearing impairment. Reading the chapter is refreshing as we, in the excitement to observe how the cochlear implant technology changes the lives of many people who use this hearing device, tend to forget that there are people with different views on cochlear implantation especially for young children. Including this chapter in this book hopefully will allow readers to critically analyze the arguments or concerns put forward by this group of people.

#### X Preface

We would like to thank Ms Ana Skalamera as the book manager of this project and her dedicated publication team at InTech for this opportunity, their help and patience in finishing this project. Dr Cila Umat would like to thank her colleague Prof Dr. Siti Zamratol-Mai Sarah Mukari who has been a mentor and a friend and has consistently encouraged her to put up to this academic research exercise and challenges. Last but not least, her very special gratitude goes to her father Hj. Umat bin Hj. Baba, her loving mother Hjh. Maznah bt Hj. Abdullah and her siblings Along Anum Umat & family, Angah Bahia Umat & family, Achik Dauza Umat & family, Ezamudin Umat, Far'ain Umat and Gazlia Umat for their ever-lasting, undivided loves, support and encouragement.

We hope that everyone who reads this book will benefit from the collection of studies presented here. *Happy reading!* 

> **Cila Umat, PhD** School of Rehabilitation Sciences Faculty of Health Sciences Universiti Kebangsaan Malaysia Kuala Lumpur Malasyia

#### **Rinze Anthony Tange MD PhD**

Associate Professor Otology (UHD) Dept. of Otorhinolaryngology University Medical Center Utrecht Netherlands

X Preface

encouragement.

presented here. *Happy reading!* 

We would like to thank Ms Ana Skalamera as the book manager of this project and her dedicated publication team at InTech for this opportunity, their help and patience in finishing this project. Dr Cila Umat would like to thank her colleague Prof Dr. Siti Zamratol-Mai Sarah Mukari who has been a mentor and a friend and has consistently encouraged her to put up to this academic research exercise and challenges. Last but not least, her very special gratitude goes to her father Hj. Umat bin Hj. Baba, her loving mother Hjh. Maznah bt Hj. Abdullah and her siblings Along Anum Umat & family, Angah Bahia Umat & family, Achik Dauza Umat & family, Ezamudin Umat, Far'ain Umat and Gazlia Umat for their ever-lasting, undivided loves, support and

We hope that everyone who reads this book will benefit from the collection of studies

**Cila Umat, PhD**

Kuala Lumpur Malasyia

> Utrecht Netherlands

School of Rehabilitation Sciences Faculty of Health Sciences Universiti Kebangsaan Malaysia

**Rinze Anthony Tange MD PhD** Associate Professor Otology (UHD) Dept. of Otorhinolaryngology University Medical Center

**Section 1** 

**Surgical Techniques** 
