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Transmission of bone conducted sound - Correlation between hearing perception and cochlear vibration.

Artikel i vetenskaplig tidskrift
Författare Måns Eeg-Olofsson
Stefan Stenfelt
Hamidreza Taghavi
Sabine Reinfeldt
Bo Håkansson
Tomas Tengstrand
Caterina Finizia
Publicerad i Hearing research
Volym 306
Sidor 11-20
ISSN 1878-5891
Publiceringsår 2013
Publicerad vid Institutionen för kliniska vetenskaper, Avdelningen för öron-, näs- och halssjukdomar
Sidor 11-20
Språk en
Länkar dx.doi.org/10.1016/j.heares.2013.08...
Ämnesord Benledningsfysiologi
Ämneskategorier Oto-rino-laryngologi, Klinisk medicin, Medicinsk apparatteknik, Medicinteknik

Sammanfattning

The vibration velocity of the lateral semicircular canal and the cochlear promontory was measured on 16 subjects with a unilateral middle ear common cavity, using a laser Doppler vibrometer, when the stimulation was by bone conduction (BC). Four stimulation positions were used: three ipsilateral positions and one contralateral position. Masked BC pure tone thresholds were measured with the stimulation at the same four positions. Valid vibration data were obtained at frequencies between 0.3 and 5.0 kHz. Large intersubject variation of the results was found with both methods. The difference in cochlear velocity with BC stimulation at the four positions varied as a function of frequency while the tone thresholds showed a tendency of lower thresholds with stimulation at positions close to the cochlea. The correlation between the vibration velocities of the two measuring sites of the otic capsule was high. Also, relative median data showed similar trends for both vibration and threshold measurements. However, due to the high variability for both vibration and perceptual data, low correlation between the two methods was found at the individual level. The results from this study indicated that human hearing perception from BC sound can be estimated from the measure of cochlear vibrations of the otic capsule. It also showed that vibration measurements of the cochlea in cadaver heads are similar to that measured in live humans.

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