Non-invasive estimation of middle-ear input impedance and efficiency

The Journal of the Acoustical Society of America
James D Lewis, S T Neely

Abstract

A method to transform the impedance measured in the ear canal, ZEC, to the plane of the eardrum, ZED, is described. The portion of the canal between the probe and eardrum was modeled as a concatenated series of conical segments, allowing for spatial variations in its cross-sectional area. A model of the middle ear (ME) and cochlea terminated the ear-canal model, which permitted estimation of ME efficiency. Acoustic measurements of ZEC were made at two probe locations in 15 normal-hearing subjects. ZEC was sensitive to measurement location, especially near frequencies of canal resonances and anti-resonances. Transforming ZEC to ZED reduced the influence of the canal, decreasing insertion-depth sensitivity of ZED between 1 and 12 kHz compared to ZEC. Absorbance, A, was less sensitive to probe placement than ZEC, but more sensitive than ZED above 5 kHz. ZED and A were similarly insensitive to probe placement between 1 and 5 kHz. The probe-placement sensitivity of ZED below 1 kHz was not reduced from that of either A or ZEC. ME efficiency had a bandpass shape with greatest efficiency between 1 and 4 kHz. Estimates of ZED and ME efficiency could extend the diagnostic capability of wideband-acoustic immittance measurements.

References

May 1, 1978·The Journal of the Acoustical Society of America·M C Killion
Jan 1, 1992·The Journal of the Acoustical Society of America·D H KeefeJ C Bulen
Jul 1, 1991·The Journal of the Acoustical Society of America·J J Rosowski
Jun 1, 1989·The Journal of the Acoustical Society of America·M R Stinson, B W Lawton
Jan 1, 1988·Scandinavian Audiology·M Kringlebotn
Jan 1, 1983·The Journal of the Acoustical Society of America·H Hudde
Oct 1, 1981·The Journal of the Acoustical Society of America·W M Rabinowitz
Oct 1, 1994·The Journal of the Acoustical Society of America·T J LynchJ J Rosowski
Jan 1, 1994·The Journal of the Acoustical Society of America·S E Voss, J B Allen
Nov 1, 1993·The Journal of the Acoustical Society of America·D H KeefeE M Burns
Jul 27, 1999·The Journal of the Acoustical Society of America·R H MargolisD H Keefe
Sep 29, 2000·The Journal of the Acoustical Society of America·G T HuangW T Peake
Sep 29, 2000·The Journal of the Acoustical Society of America·G T HuangW T Peake
Sep 27, 2001·The Journal of the Acoustical Society of America·S E VossW T Peake
Sep 27, 2001·The Journal of the Acoustical Society of America·S E VossW T Peake
Aug 21, 2002·The Journal of the Acoustical Society of America·B L Farmer-Fedor, R D Rabbitt
Sep 15, 2005·The Journal of the Acoustical Society of America·Cara E Stepp, Susan E Voss
Jan 27, 2006·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Ritvik P MehtaSaumil N Merchant
Jan 8, 2008·The Journal of the Acoustical Society of America·Kevin N O'Connor, Sunil Puria
Jul 5, 2008·Ear and Hearing·Susan E VossKathryn N Sheffield
Jul 24, 2008·The Journal of the Acoustical Society of America·Rachel A ScheperleMichael P Gorga
Feb 6, 2009·Ear and Hearing·Navid ShahnazBrian D Westerberg
Dec 17, 2009·The Journal of the Acoustical Society of America·James D LewisPatricia G Stelmachowicz
Aug 23, 2011·Ear and Hearing·John J RosowskiSaumil N Merchant
Nov 1, 2011·Ear and Hearing·Susan E VossNicholas J Horton
Jan 10, 2012·The Journal of the Acoustical Society of America·Daniel M Rasetshwane, Stephen T Neely
Jan 10, 2012·The Journal of the Acoustical Society of America·Rachel A ScheperleStephen T Neely
Mar 20, 2012·The Journal of the Acoustical Society of America·Daniel M RasetshwaneChristopher A Shera
Aug 7, 2013·Journal of the Association for Research in Otolaryngology : JARO·Robert H Withnell, Lauren E Gowdy
Oct 15, 2013·The Journal of the Acoustical Society of America·Michael E Ravicz, John J Rosowski
Aug 30, 2014·Ear and Hearing·Katherine A GroonStephen T Neely
Oct 18, 2014·The Journal of the Acoustical Society of America·Natalie N SouzaJonathan H Siegel
Apr 30, 2015·The Journal of the Acoustical Society of America·Douglas H Keefe

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Citations

Feb 6, 2017·The Journal of the Acoustical Society of America·Karolina K Charaziak, Christopher A Shera
Oct 3, 2020·The Journal of the Acoustical Society of America·Douglas H Keefe
May 10, 2019·The Journal of the Acoustical Society of America·Michael E RaviczJohn J Rosowski
Sep 2, 2019·The Journal of the Acoustical Society of America·Kren Rahbek NørgaardChristopher A Shera
Nov 2, 2019·Journal of the Association for Research in Otolaryngology : JARO·Gabrielle R MerchantHideko H Nakajima
Jul 8, 2021·Computer Methods in Biomechanics and Biomedical Engineering·Houguang LiuXinsheng Huang
Sep 3, 2021·The Journal of the Acoustical Society of America·Gabrielle R Merchant, Stephen T Neely

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