Objectives of middle-ear research (16 of 24)

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1. Motivation

2. Research objectives

3.1 Adults

3.2 Newborns

3.2 Newborns (cont'd)

4.1 Audiogram

4.2 Auditory brainstem response

4.2 Auditory brainstem response (cont'd)

4.3 Otoacoustic emissions

4.3 Otoacoustic emissions (cont'd)

4.3.1 Limitations

4.4 Acoustical input admittance

4.4 Acoustical input admittance (cont'd)

4.5 Tympanometry

16 of 24

5.1 Passive prostheses

5.1 Passive prostheses (cont'd)

5.1 Passive prostheses (cont'd)

5.1 Passive prostheses (cont'd)

5.2 Passive external devices

5.3 Hearing aids and implants

6. Inner ear

7. Teaching

4.5 Tympanometry (cont'd)

Infant tympanograms

Tympanograms from 156-day-old infant for three frequencies Right ear (top) was normal, left ear (bottom) had middle-ear effusions and failed hearing screening test
Dark lines = susceptance, light lines = conductance
Units for horizontal axes (static pressure) = daPa, vertical axes = mmho

Newborn tympanogram is different from adult
Limited information in low-frequency measurements
Multi-frequency and wideband measurements poorly understood

In this example

right ear was normal
left ear contained liquid

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BMDE-501 Modelling middle-ear mechanics

Last modified: 2025-10-01 12:38:02

Slide show generated from me_obj.html by Weasel 2025 Oct 1