About The Book

The Human Ear Canal, Second Edition covers a wide range of topics pertinent to the human ear canal and its contribution to audiological services.

The first chapter is an introduction to the book by the editor. The second chapter, Development of the Outer Ear, discusses the embryonic development of the ear canal and further alterations due to progressive changes in aging. The third chapter, Ear Canal Anatomy, describes the shape, size, neural innervations, and vascular supply to the ear canal. The illustrations in this chapter provide an enhanced view of the various structures within the ear canal. The fourth chapter, Ear Canal Examination, emphasizes the need for good visualization of the ear canal during examination. The fifth chapter deals with pathological conditions of the ear canal.

Chapter six, Ear Canal Acoustics, describes various techniques to determine ear canal geometry, the importance of sound pressure measurements within the ear canal, and the variables affecting ear canal measurements. In this chapter, an attempt is made to gather all the relevant publications in the area of ear canal measurements so that students and audiologists need not spend countless hours searching numerous journals to keep up with the rapid development in measurements performed within the ear canal. Chapter seven on Deep Canal Hearing Aids emphasizes the relationship between the hearing aid and the ear canal; the importance of the ear canal and its associated structures for successful hearing aid fitting is also discussed.

Chapters eight and nine are devoted Cerumen Management. Excessive cerumen can be a problem for hearing professionals and their patients. Its presence can interfere with patient testing and make it impossible to obtain reliable test results or obtain a precise ear canal impression. The normal course of cerumen production, the causes and prevalence of cerumen impaction, the consequences of cerumen accumulation on audiological diagnosis, and the precise procedures for cerumen management are detailed.

The book includes contributions from Richard T. Miyamoto, MD, Christopher Miyamoto, MD, and Brian Taylor, AuD.

About The Author

Bopanna B. Ballachanda, PhD, holds a doctoral degree in auditory neurophysiology from the University of Texas-Dallas and is the founder and CEO of Premier Hearing Center which has several audiology clinics in Arizona, New Mexico, and Texas. He has worked as an Assistant Professor of Audiology at Purdue University and an Associate Professor in Speech and Hearing Sciences and an adjunct Associate Professor in the Department of Otolaryngology at the University of New Mexico. Dr. Ballachanda is also a member of several professional and scientific societies, and has published articles in peer-reviewed and clinical journals. He spearheaded the first cerumen management workshop for audiologists in 1992 and is nationally and internationally recognized for his workshops and lectures on cerumen management. He was a member of the American Academy of Otolaryngology-Head and Neck Surgery task force that developed and published “Clinical practice guideline: Cerumen impaction” in 2008. He was elected to the Board of Directors of the American Academy of Audiology.

Table Of Contents

CHAPTER 1 Introduction
Bopanna B. Ballachanda

CHAPTER 2 Developmental Anatomy of the Outer Ear
Bopanna B. Ballachanda

CHAPTER 3 Anatomy of the Ear Canal
Richard T. Miyamoto and R. Christopher Miyamoto

CHAPTER 4 Ear Canal Examination
Bopanna B. Ballachanda

CHAPTER 5 Ear Canal Pathology
Richard T. Miyamoto and R. Christopher Miyamoto

CHAPTER 6 Ear Canal Acoustics
Bopanna B. Ballachanda

CHAPTER 7 Deep Canal Hearing Aids
Brian Taylor

CHAPTER 8 Cerumen: Genetics, Anthropology, Physiology, and Pathophysiology
Bopanna B. Ballachanda

CHAPTER 9 Cerumen Management
Bopanna B. Ballachanda


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