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Wideband Power Reflectance and Power Transmittance as Tools for Assessing Middle-Ear Function

Mimosa Acoustics, Inc.
Champaign, IL

Jont B. Allen

Department of Electrical and Computer Engineering, University of Illinois, Urbana-Champaign, IL

Judi A. Lapsley Miller

Mimosa Acoustics, Inc.
Champaign, IL

Harry Levitt

Advanced Hearing Concepts
Bodega Bay, CA

Hearing screening programs using otoacoustic emissions can have high false positive rates, due to temporary middle-ear and outer-ear disorders. This is especially the case for newborns, infants, and young children. Standard tympanometry is limited, uncomfortable, and unreliable in young ears. By incorporating wideband acoustic power flow measurements into hearing screening (using the same equipment), middle-ear and outer-ear disorders can be detected, thus allowing for rescreening rather than more expensive audiological referrals. Wideband acoustic power flow is described in detail and four case examples are provided for adults and children.