Send to

Choose Destination
See comment in PubMed Commons below
J Rehabil Res Dev. 2005 Jul-Aug;42(4 Suppl 2):63-78.

Evaluation of human middle ear function via an acoustic power assessment.

Author information

Department of Electrical and Computer Engineering, University of Illinois, 2061 Beckman Laboratory, Urbana-Champaign, IL 61801, USA.


Measurements of middle ear (ME) acoustic power flow (power reflectance, power absorption, and transmittance) and normalized impedance (acoustic resistance, acoustic reactance, and impedance magnitude) were compared for their utility in clinical applications. Transmittance, a measure of the acoustic power absorbed by the ME, was found to have several important advantages over other measures of acoustic power flow. In addition to its simple and audiologically relevant physical interpretation (absorbed power), the normal transmittance curve has a simple shape that is visually similar to the ME transfer function. The acoustic impedance measures (resistance and reactance) provided important additional information about ME status and supplemented transmittance measurements. Together these measurements can help identify unusual conditions such as eardrum perforations. While this article is largely a review of the development of a commercial power reflectance measurement system, previously unpublished experimental results are presented.

[Indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Department of Veterans Affairs, Rehabilitation Research & Development Service
    Loading ...
    Support Center