The tympanometric effects of the methodologic variables of direction and rate of pressure change were studied in cats. Tympanogram morphologic findings differed between ascending and descending pressure runs, with the descending ones being simpler in configuration and less influenced by the rate of pressure change. The stability of tympanograms to repetitive testing was examined in the same cats, and five human subjects. Acoustic admittance increased sequentially during the first three pressure sweeps of a repetitive testing sequence in a majority of both groups.
Get full access to this article
View all access options for this article.
References
1.
PorterTAWinstonME: Methodological aspects of admittance measurements of the middle ear. J Aud Res13: 172–177, 1973.
2.
CretenWLVan CampKJ: Transient and quasi-static tympanograms. Scand Audiol3: 39–42, 1974.
3.
MargolisRHOsguthorpeJDPopelkaGR: The effects of experimentally-produced middle ear lesions on tympanometry in cats. Acta Otolaryngol86: 428–436, 1978.
