Hearing Aids / Edition 1

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More About This Textbook

Overview

Praise for this book:

This book succeeds in its aim of providing a practically useful and theoretically sound comprehensive ook on hearing aids ... It makes the most complicated concepts easy to understand, with excellent cross referencing ... I certainly wouldn't want to be without this book and I highly recommend it to everyone with an interest in hearing aids. — Pauline Smith, ENT & Audiology News

Praise for the first edition:

One of the best textbooks I have ever used...written by a researcher with a stellar reputation [who is also] an expert on the clinical aspects of the field...packed with information from both a theoretical and practical perspective...makes difficult concepts comprehensible...from an instructors point of view, it is a sheer delight. —Adrienne Rubenstein, PhD, Professor, Department of Speech Communication Arts and Sciences, Brooklyn College, New York

Key Features:

  • Completely revised to reflect the research and technological advances of the last decade
  • New chapters on directional microphones and the latest digital signal processing strategies
  • Extensive coverage of all aspects of open-canal, thin-tube hearing aids
  • Practical tips, tables, and procedures designed to be pinned on the walls of clinics
  • Each cross-referenced chapter builds on the previous chapters

Hearing Aids, Second Edition, is a book within a book:

  • Each chapter has a one-page synopsis that captures the key concepts of each topic
  • The material that students most need is contained in marked paragraphs that flow after each other to form a coherent thin book inside the larger book
  • Intervening additional paragraphs add satisfying depth

Written, comprehensively referenced, and extensively reviewed by leaders in the field, this book is ideal as a core graduate text as well as a standard reference for clinicians.

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Editorial Reviews

From the Publisher
An exhaustive and in-depth look at virtually all aspects of hearing aids...well-written...comprehensive...Harry Dillon is certainly one of the world's best hearing aid experts...a valuable text for a graduate-level hearing aid seminar, as well as a clinic reference for practicing audiologists. —www.audiology.orgOne of the best textbooks I have ever used...written by a researcher with a stellar reputation [who is also] an expert on the clinical aspects of the field...packed with information from both a theoretical and practical perspective...makes difficult concepts comprehensible...from an instructor's point of view, it is a sheer delight. —Adrienne Rubenstein, PhD, Professor, Department of Speech Communication Arts and Sciences, Brooklyn College, New YorkThe book is smashing!..Should be a required reference for anyone who deals with hearing aids. All of the materials, including an outstanding chapter on pediatric amplification, are presented in a practical and immediately useful manner.—Jerry Northern, author and editor, HearX, FloridaPacked with concise, up-to-date, useful information concerning the selection and fitting of hearing aids. I'd highly recommend this text for graduate audiology students or anyone involved in hearing aid dispensing. —Gus Mueller, Adjunct Associate Professor, Vanderbilt University[Five out of five ears for students] A comprehensive look at hearing aids...a very readable text...complex concepts are presented in a user-friendly and understandable fashion, without compromising detail or precision...an in-depth look of virtually all aspects of hearing aids...carefully documents cochlear implant candidacy...[written by] one of the world's best hearing aid experts.—American Academy of Audiology
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Product Details

  • ISBN-13: 9781588900524
  • Publisher: Thieme
  • Publication date: 4/19/2001
  • Edition description: Older Edition
  • Edition number: 1
  • Pages: 528
  • Product dimensions: 6.92 (w) x 10.28 (h) x 0.99 (d)

Meet the Author

National Acoustic Laboratories

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Table of Contents

Preface
1 Introductory Concepts 1
1.1 Problems Faced by People with Hearing Impairment 2
1.2 Acoustic Measurements 6
1.3 Types of Hearing Aids 10
1.4 Historical Perspective 12
2 Hearing Aid Components 18
2.1 Block Diagrams 19
2.2 Microphones 21
2.3 Amplifiers 28
2.4 Digital Circuits 34
2.5 Tone Controls and Filters 36
2.6 Receivers 39
2.7 Acoustic Dampers 41
2.8 Telecoils 42
2.9 Audio (Electrical) Input 42
2.10 Remote Controls 43
2.11 Bone Conductors 44
2.12 Batteries 45
3 Hearing Aid Systems 48
3.1 Custom and Modular Construction 48
3.2 Analog Hearing Aids 50
3.3 Digitally Programmable Analog Hearing Aid Systems 51
3.4 Digital Hearing Aids 53
3.5 Remote Sensing and Transmitting Hearing Aid Systems 58
3.6 Induction Loops 59
3.7 Radio-frequency Transmission 64
3.8 Infrared Transmission 69
3.9 Classroom Sound-field Amplification 69
3.10 Strengths and Weaknesses of Remote Transmission Systems 70
3.11 Assistive Listening Devices 72
4 Electroacoustic Performance and Measurement 74
4.1 Measuring Hearing Aids in Couplers and Ear Simulators 75
4.2 Real-Ear Aided Gain (REAG) 89
4.3 Insertion Gain 96
4.4 Practical issues in real-ear testing 101
4.5 Aided Threshold Testing and Functional Gain 106
4.6 Feedback in Hearing Aids 107
4.7 Troubleshooting Faulty Hearing Aids 111
5 Hearing Aid Earmolds, Earshells and Coupling Systems 117
5.1 Earmold and earshell physical styles 120
5.2 Overview of Earmold and Earshell Acoustics 123
5.3 Venting 123
5.4 The Sound Bore: Tubing, Horns and Constriction 137
5.5 Dampers 143
5.6 Specific Tubing, Damping and Venting Configurations 144
5.7 Procedure for Selecting Earmold and Earshell Acoustics 144
5.8 Ear Impressions 146
5.9 Earmolds and Earshells 152
6 Compression Systems in Hearing Aids 159
6.1 Compression's Major Role: Reducing the Signal's Dynamic Range 160
6.2 Basic characteristics of a compressor 161
6.3 Rationales for Use of Compression 169
6.4 Combinations of Compressors in Hearing Aids 180
6.5 Benefits and Disadvantages of Different Compression Systems 181
7 Advanced Signal Processing Schemes 187
7.1 Multi-Microphone and Other Directional Hearing Aids 188
7.2 Single-Microphone Noise Reduction 195
7.3 Feedback Reduction 198
7.4 Frequency Transposition 202
7.5 Speech Cue Enhancement 204
8 Assessing Candidacy for Hearing Aids 209
8.1 The Lower Limit of Aidable Hearing Loss 211
8.2 The Upper Limit of Aidable Hearing Loss 226
8.3 Medically Related Contra-indications to Hearing Aid Fitting 233
9 Prescribing Hearing Aid Performance 234
9.1 General Concepts Behind Prescription and a Brief History 235
9.2 Gain and Frequency Response Prescription for Linear Amplification 238
9.3 Gain, Frequency Response, and Input-Output Functions for Nonlinear Amplification 249
9.4 Allowing for Conductive and Mixed Hearing Losses 262
9.5 Selecting Options for Multi-memory Hearing Aids 264
9.6 Prescribing OSPL90 267
9.7 Excessive Amplification and Subsequent Hearing Loss 276
10 Selecting and Adjusting Hearing Aids 281
10.1 Selecting Hearing Aid Style: CIC, ITC, ITE, BTE, Spectacle Aid, or Body Aid 282
10.2 Selecting Hearing Aid Features 284
10.3 Selecting a Signal Processing Scheme and Prescription Method 286
10.4 Overview of Hearing Aid Selection and Adjustment 289
10.5 Twelve Steps for Selecting and Adjusting Programmable Hearing Aids 290
10.6 Eleven Steps for Selecting and Adjusting Non-programmable Aids 293
10.7 Allowing for Individual Ear Size and Shape in the Coupler Prescription 297
10.8 Allowing for Surgically Altered Ear Canals 300
10.9 Verifying and Achieving the Prescribed Real-ear Response 300
10.10 Verifying and Fine-tuning OSPL90 300
11 Problem Solving and Fine-Tuning of Hearing Aids 302
11.1 Solving Common Problems 303
11.2 Systematic Fine-tuning Procedures 312
11.3 Concluding Comments: Fine-tuning in Perspective 320
12 Counseling the New Hearing Aid Wearer 322
12.1 Understanding Hearing Loss 323
12.2 Acquiring a Hearing Aid 325
12.3 Using Hearing Aids 327
12.4 Adjusting a New Experiences with Sound and Hearing Aids 327
12.5 Care of Hearing Aids 331
12.6 Hearing Strategies 332
12.7 Involving Families and Friends 337
12.8 Communication Training 338
12.9 Avoiding Hearing Aid-Induced Hearing Loss 339
12.10 Assistive Listening Devices 340
12.11 Ongoing Support 340
12.12 Counseling Styles 340
12.13 Structuring Appointments 342
13 Assessing the Outcomes of Hearing Rehabilitation 349
13.1 Speech Identification Testing 351
13.2 Self-report Questionnaires for Assessing Benefit 353
13.3 Meeting Needs and Goals 359
13.4 Assessing Usage, Problems, and Satisfaction 363
13.5 Changes in Outcomes with Time after Fitting 366
13.6 Impact of Hearing Aids on General Health and Quality of Life 368
14 Binaural and Bilateral Considerations in Hearing Aid Fitting 370
14.1 Binaural Effects in Localization 372
14.2 Binaural Effects in Detection and Recognition 376
14.3 Advantages of Bilateral Fittings 380
14.4 Disadvantages of Bilateral Fittings 388
14.5 Tests of Bilateral Advantage 390
14.6 Fitting Asymmetrical Hearing Losses 395
14.7 Deciding on Bilateral versus Unilateral Fittings 399
14.8 Effect of Bilateral vs Unilateral Fitting on Electroacoustic Prescriptions 402
15 Special Hearing Aid Issues for Children 404
15.1 Sensory Experience and Deprivation 405
15.2 Assessment of Hearing Loss 406
15.3 Hearing Aid and Earmold Features and Styles 408
15.4 Prescribing Amplification for Children 412
15.5 Verifying Real-ear Performance 419
15.6 Evaluating Aided Performance 419
15.7 Helping Parents 425
15.8 Hearing Habilitation Goals 428
15.9 Teenagers and Cosmetic Concerns 431
15.10 Safety Issues 431
16 CROS, Bone-Conduction, and Implanted Hearing Aids 434
16.1 CROS Hearing Aids 434
16.2 Bone-conduction Hearing Aids 442
16.3 Implanted and Semi-implanted Hearing Aids 447
References 451
Index 487
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