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Vibration characteristics of bone conducted sound in vitro
Chalmers University Technology.ORCID-id: 0000-0003-3350-8997
Chalmers University Technology.
Sahlgrenska University Hospital.
2000 (engelsk)Inngår i: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 107, nr 1, s. 422-431Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A dry skull added with damping material was used to investigate the vibratory pattern of bone conducted sound. Three orthogonal vibration responses of the cochleae were measured, by means of miniature accelerometers, in the frequency range 0.1-10 kHz. The exciter was attached to the temporal, parietal, and frontal bones, one at the time. In the transmission response to the ipsilateral; cochlea, a profound low frequency antiresonance (attenuation) was found, verified psycho-acoustically, and shown to yield a distinct lateralization effect. It was also shown that, for the ipsilateral side, the direction of excitation coincides with that of maximum response. At the contralateral cochlea, no such dominating response direction was found for frequencies above the first skull resonance. An overall higher response level was achieved, for the total energy transmission in general and specifically for the direction of excitation, at the ipsilateral cochlea when the transducer was attached to the excitation point closest to the cochlea. The transranial attenuation was found to be frequency dependent, with values from -5 to 10 dB for the energy transmission and -30 to 40 dB for measurements in a single direction, with a tendency toward higher attenuation at the higher frequencies.

sted, utgiver, år, opplag, sider
Acoustical Society of America , 2000. Vol. 107, nr 1, s. 422-431
Emneord [en]
hearing, biomechanics, bone
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-59770DOI: 10.1121/1.428314ISI: 85225900036OAI: oai:DiVA.org:liu-59770DiVA, id: diva2:353384
Tilgjengelig fra: 2010-09-27 Laget: 2010-09-24 Sist oppdatert: 2017-12-12

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