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Wideband Acoustic Immittance: Tympanometric Measures

Sanford, Chris A.1; Hunter, Lisa L.2; Feeney, M. Patrick3,4; Nakajima, Hideko Heidi5,6

doi: 10.1097/AUD.0b013e31829c7250

Wideband tympanometry (WT) measurements provide a view of the acoustic response properties of the middle ear over a broad range of frequencies and ear-canal pressures. These measurements show sensitivity to trends in ear-canal/middle ear maturation and changes in middle ear status as a result of different types of dysfunction. While results from early WT work showed improvements over ambient wideband tests in terms of test performance for identifying middle ear dysfunction and conductive hearing loss (CHL), more recent studies have shown high, but similar test performance for both ambient and tympanometric wideband tests. Case study and group results presented in this article, demonstrating the sensitivity of WT to middle ear dysfunction, CHL, and maturational changes in the middle ear, are promising and suggest the need for additional investigations in individual subjects and large subject populations. Future research should focus on identifying key predictors of developmental trends, middle ear dysfunction, and CHL in an effort to develop middle ear tests with high sensitivity and specificity. Technological advances, more accessibility to equipment, and evolving data analysis techniques should encourage progress in the areas of WT research and clinical application.

1Department of Communication Sciences and Disorders, Idaho State University, Pocatello, Idaho, USA; 2Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA; 3National Center for Rehabilitative Auditory Research, Portland Veterans Affairs Medical Center, Portland, Oregon, USA; 4Department of Otolaryngology, Head and Neck Surgery, Oregon Health and Science University, Portland, Oregon, USA; 5Eaton-Peabody Laboratory, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA; and 6Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts, USA.

ACKNOWLEDGMENTS: This views expressed in this article do not represent the views of the Department of Veterans Affairs or of the U.S. Government.

The authors have no conflicts of interest to disclose.

Address for correspondence: Chris A. Sanford, Idaho State University, 921 S. 8th Avenue, Mail Stop 8116, Pocatello, ID 83209, USA. E-mail:

Received February 1, 2013

Accepted May 17, 2013

© 2013 by Lippincott Williams & Wilkins