Effects of ear-canal pressurization on middle-ear bone- and air-conduction responses.

Hearing Research
Kenji HommaSunil Puria

Abstract

In extremely loud noise environments, it is important to not only protect one's hearing against noise transmitted through the air-conduction (AC) pathway, but also through the bone-conduction (BC) pathways. Much of the energy transmitted through the BC pathways is concentrated in the mid-frequency range around 1.5-2 kHz, which is likely due to the structural resonance of the middle ear. One potential approach for mitigating this mid-frequency BC noise transmission is to introduce a positive or negative static pressure in the ear canal, which is known to reduce BC as well as AC hearing sensitivity. In the present study, middle-ear ossicular velocities at the umbo and stapes were measured using human cadaver temporal bones in response to both BC and AC excitations, while static air pressures of +/-400 mm H(2)O were applied in the ear canal. For the maximum negative pressure of -400 mm H(2)O, mean BC stapes-velocity reductions of about 5-8 dB were observed in the frequency range from 0.8 to 2.5 kHz, with a peak reduction of 8.6(+/-4.7)dB at 1.6 kHz. Finite-element analysis indicates that the peak BC-response reduction tends to be in the mid-frequency range because the middle-ear BC resonance, which is typically around 1.5-2 kHz, i...Continue Reading

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Citations

Mar 2, 2011·Journal of the Association for Research in Otolaryngology : JARO·Namkeun KimSunil Puria
Apr 10, 2013·Journal of the Association for Research in Otolaryngology : JARO·Pim van Dijk, Geoffrey A Manley
Nov 10, 2010·Journal of the Association for Research in Otolaryngology : JARO·Pim van DijkEmile de Kleine
Jan 3, 2016·Hearing Research·Pieter G G MuyshondtJoris J J Dirckx
Mar 8, 2011·Journal of Biomechanics·G VolandriC Carmignani
Jul 6, 2014·Biophysical Journal·Namkeun KimSunil Puria
Sep 4, 2016·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Bruno AreiasMarco Pl Parente
Sep 6, 2018·The Journal of the Acoustical Society of America·Andrew A TubelliDavid C Mountain
Sep 2, 2018·Journal of the Association for Research in Otolaryngology : JARO·Christof StiegerHideko Heidi Nakajima
Nov 25, 2019·Biomechanics and Modeling in Mechanobiology·Jing ZhangZhushi Rao
Apr 3, 2020·The Journal of the Acoustical Society of America·Ivo DobrevChristof Röösli
Sep 17, 2021·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Daniel Perez PlasenciaAngel Ramos Macias

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