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Simulation of the power transmission of bone-conducted sound in a finite-element model of the human head
Linköping University, Department of Clinical and Experimental Medicine, Division of Speech language pathology, Audiology and Otorhinolaryngology. Linköping University, Faculty of Medicine and Health Sciences.
Incheon Natl Univ, South Korea.
Linköping University, Department of Clinical and Experimental Medicine, Division of Speech language pathology, Audiology and Otorhinolaryngology. Linköping University, Faculty of Medicine and Health Sciences.ORCID iD: 0000-0003-3350-8997
2018 (English)In: Biomechanics and Modeling in Mechanobiology, ISSN 1617-7959, E-ISSN 1617-7940, Vol. 17, no 6, p. 1741-1755Article in journal (Refereed) Published
Abstract [en]

Bone conduction (BC) sound is the perception of sound transmitted in the skull bones and surrounding tissues. To better understand BC sound perception and the interaction with surrounding tissues, the power transmission of BC sound is investigated in a three-dimensional finite-element model of a whole human head. BC sound transmission was simulated in the FE model and the power dissipation as well as the power flow following a mechanical vibration at the mastoid process behind the ear was analyzed. The results of the simulations show that the skull bone (comprises the cortical bone and diploe) has the highest BC power flow and thereby provide most power transmission for BC sound. The soft tissues was the second most important media for BC sound power transmission, while the least BC power transmission is through the brain and the surrounding cerebrospinal fluid (CSF) inside the cranial vault. The vibrations transmitted in the skull are mainly concentrated at the skull base when the stimulation is at the mastoid. Other vibration transmission pathways of importance are located at the occipital bone at the posterior side of the head while the transmission of sound power through the face, forehead and vertex is minor. The power flow between the skull bone and skull interior indicate that some BC power is transmitted to and from the skull interior but the transmission of sound power through the brain seem to be minimal and only local to the brain-bone interface.

Place, publisher, year, edition, pages
SPRINGER HEIDELBERG , 2018. Vol. 17, no 6, p. 1741-1755
Keywords [en]
Bone conduction sound; Finite-element model; Power transmission
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:liu:diva-153694DOI: 10.1007/s10237-018-1053-4ISI: 000452359300011PubMedID: 30019294OAI: oai:DiVA.org:liu-153694DiVA, id: diva2:1276207
Note

Funding Agencies|European Union [600933]

Available from: 2019-01-07 Created: 2019-01-07 Last updated: 2019-03-25

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Chang, YouStenfelt, Stefan
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