Cartilage conduction is characterized by vibrations of the cartilaginous portion of the ear canal

PloS One
Tadashi NishimuraHarry Levitt

Abstract

Cartilage conduction (CC) is a new form of sound transmission which is induced by a transducer being placed on the aural cartilage. Although the conventional forms of sound transmission to the cochlea are classified into air or bone conduction (AC or BC), previous study demonstrates that CC is not classified into AC or BC (Laryngoscope 124: 1214-1219). Next interesting issue is whether CC is a hybrid of AC and BC. Seven volunteers with normal hearing participated in this experiment. The threshold-shifts by water injection in the ear canal were measured. AC, BC, and CC thresholds at 0.5-4 kHz were measured in the 0%-, 40%-, and 80%-water injection conditions. In addition, CC thresholds were also measured for the 20%-, 60%-, 100%-, and overflowing-water injection conditions. The contributions of the vibrations of the cartilaginous portion were evaluated by the threshold-shifts. For AC and BC, the threshold-shifts by the water injection were 22.6-53.3 dB and within 14.9 dB at the frequency of 0.5-4 kHz, respectively. For CC, when the water was filled within the bony portion, the thresholds were elevated to the same degree as AC. When the water was additionally injected to reach the cartilaginous portion, the thresholds at 0.5 and ...Continue Reading

References

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Oct 30, 2013·The Laryngoscope·Tadashi NishimuraHarry Levitt
Jun 17, 2014·Journal of Rehabilitation Research and Development·Chihiro MorimotoToshiaki Yamanaka
Sep 10, 2014·Auris, Nasus, Larynx·Tadashi NishimuraHarry Levitt
Sep 23, 2014·The Journal of the Acoustical Society of America·Ryota ShimokuraHarry Levitt

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Citations

Mar 30, 2016·Auris, Nasus, Larynx·Ryosuke MiyamaeTadashi Kitahara
Dec 12, 2017·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Tadashi NishimuraTadashi Kitahara
Feb 14, 2020·Journal of Audiology & Otology·Miriam Geal-DorHaim Sohmer
Aug 8, 2020·European Archives of Oto-rhino-laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·Takanori NishiyamaKaoru Ogawa
Aug 11, 2020·International Journal of Audiology·Tadashi NishimuraTadashi Kitahara
Sep 3, 2020·The Journal of the Acoustical Society of America·Tadashi NishimuraTadashi Kitahara
Jan 26, 2021·International Journal of Pediatric Otorhinolaryngology·Takanori NishiyamaKaoru Ogawa
Jun 4, 2021·Journal of the American Academy of Audiology·Tadashi NishimuraMasahiro Komori
Jul 3, 2021·Audiology Research·Tadashi NishimuraTadashi Kitahara
Aug 28, 2021·Audiology Research·Ronny SuwentoTadashi Nishimura

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Software Mentioned

- AC
Cartilage

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