37
Views
7
CrossRef citations to date
0
Altmetric
Original Article

Normal Function of the Middle Ear and Its Measurement

Pages 4-14 | Published online: 07 Jul 2009
 

Abstract

Some principles underlying acoustic impedance measurements in the ear canal and their evaluation are reviewed. The following topics are included: some methods of measurement, useful frequency range, the middle-ear system, impedance characteristics of normal and some pathological ears, and the relation between the impedance and tympanometric results. Advantages and disadvantages of measurements with an acoustic bridge and parallel probe tubes are contrasted and the same is done for tympanometry versus static impedance measurements. The relation between tympanograms and static impedance data referred to the tympanic membrane is illustrated by means of a semihypothetical example. The example suggests that a probe frequency around 700 Hz is more informative in tympanometry than a probe frequency of 220 Hz.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.