Volume 1, Chapter 02: Application of Wideband Acoustic Immittance (WAI) in Assessment of the Middle Ear in Newborns, Children, and Adults



As wideband acoustic immittance (WAI) gains popularity, it is essential to understand the impact of different middle ear pathologies on Absorbance patterns. The purpose of this chapter is to cover the general principles of absorbance/reflectance techniques and examine absorbance patterns in normal and various middle ear pathologies in newborns, children and adults. Absorbance results in cases of otitis media with effusion, negative middle ear pressure, otosclerosis, ossicular discontinuity, and ear drum perforation will be compared to age appropriate normative data. Where applicable, absorbance patterns obtained at ambient pressure as well as pressurized mode (Wideband Tympanometry) will be reviewed and compare with traditional tympanometric results.



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Chapter Contributor

Navid Shahnaz PhD, AuD


Dr. Shahnaz  is currently an Associate Professor of audiology in the School of Audiology & Speech Sciences at the University of British Columbia (UBC), where he has been a faculty member since July 2002. He has been a Speech-Language and Audiology Canada (SAC) certified member since November 1995. He was a member of the national (CASLPA) Audiology Examination Committee between 2002 and 2008, and a member of the CASLPA Board of Governors (2011-2014), where he was the representative of the Canadian Council of University Programs in Communication Sciences and Disorders. His main area of research interest includes multi-frequency tympanometry, Wideband Acoustic Immittance, otoacoustic emissions, and acoustic reflex studies in adults, children, and infants. His research interests also focus on the assessment of the balance systems using vestibular evoked myogenic potentials, and the development of test batteries for assessment of the silent (hidden) hearing loss. He can be reached at : This email address is being protected from spambots. You need JavaScript enabled to view it.