Significance of a notch in the otoacoustic emission stimulus spectrum.
(2012) In Journal of Laryngology and Otology 126(9). p.897-901- Abstract
- Objective:
To explain a clinical observation: a notch in the stimulus spectrum during transient evoked otoacoustic emission measurement in ears with secretory otitis media.
Methods:
The effects of tympanic under-pressure were investigated using a pressure chamber. A model of the ear canal was also studied.
Results:
Tympanic membrane reflectance increased as a consequence of increased stiffness, causing a notch in the stimulus spectrum. In an adult, the notch could be clearly distinguished at an under-pressure of approximately -185 daPa. The sound frequency of the notch corresponded to a wavelength four times the ear canal length. The ear canal of infants was too short to... (More) - Objective:
To explain a clinical observation: a notch in the stimulus spectrum during transient evoked otoacoustic emission measurement in ears with secretory otitis media.
Methods:
The effects of tympanic under-pressure were investigated using a pressure chamber. A model of the ear canal was also studied.
Results:
Tympanic membrane reflectance increased as a consequence of increased stiffness, causing a notch in the stimulus spectrum. In an adult, the notch could be clearly distinguished at an under-pressure of approximately -185 daPa. The sound frequency of the notch corresponded to a wavelength four times the ear canal length. The ear canal of infants was too short to cause a notch within the displayed frequency range. The notch was demonstrated using both Otodynamics and Madsen equipment.
Conclusion:
A notch in the otoacoustic emission stimulus spectrum can be caused by increased stiffness of the tympanic membrane, raising suspicion of low middle-ear pressure or secretory otitis media. This finding is not applicable to infants. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3047506
- author
- Grenner, Jan LU
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Laryngology and Otology
- volume
- 126
- issue
- 9
- pages
- 897 - 901
- publisher
- Cambridge University Press
- external identifiers
-
- wos:000308381800004
- pmid:22892219
- scopus:84865211971
- pmid:22892219
- ISSN
- 1748-5460
- DOI
- 10.1017/S0022215112001533
- language
- English
- LU publication?
- yes
- id
- 9fe0eed1-801f-46d7-b677-f575bb61159d (old id 3047506)
- alternative location
- http://www.ncbi.nlm.nih.gov/pubmed/22892219?dopt=Abstract
- date added to LUP
- 2016-04-04 08:56:38
- date last changed
- 2022-01-29 07:55:53
@article{9fe0eed1-801f-46d7-b677-f575bb61159d, abstract = {{Objective: <br/><br> To explain a clinical observation: a notch in the stimulus spectrum during transient evoked otoacoustic emission measurement in ears with secretory otitis media. <br/><br> <br/><br> Methods: <br/><br> The effects of tympanic under-pressure were investigated using a pressure chamber. A model of the ear canal was also studied. <br/><br> <br/><br> Results: <br/><br> Tympanic membrane reflectance increased as a consequence of increased stiffness, causing a notch in the stimulus spectrum. In an adult, the notch could be clearly distinguished at an under-pressure of approximately -185 daPa. The sound frequency of the notch corresponded to a wavelength four times the ear canal length. The ear canal of infants was too short to cause a notch within the displayed frequency range. The notch was demonstrated using both Otodynamics and Madsen equipment. <br/><br> <br/><br> Conclusion: <br/><br> A notch in the otoacoustic emission stimulus spectrum can be caused by increased stiffness of the tympanic membrane, raising suspicion of low middle-ear pressure or secretory otitis media. This finding is not applicable to infants.}}, author = {{Grenner, Jan}}, issn = {{1748-5460}}, language = {{eng}}, number = {{9}}, pages = {{897--901}}, publisher = {{Cambridge University Press}}, series = {{Journal of Laryngology and Otology}}, title = {{Significance of a notch in the otoacoustic emission stimulus spectrum.}}, url = {{https://lup.lub.lu.se/search/files/5217236/3327536.pdf}}, doi = {{10.1017/S0022215112001533}}, volume = {{126}}, year = {{2012}}, }