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Bone conduction hearing sensitivity in normal-hearing subjects: Transcutaneous stimulation at BAHA vs BCI position

Sabine Reinfeldt (Institutionen för signaler och system, Medicinska signaler och system) ; Bo Håkansson (Institutionen för signaler och system, Medicinska signaler och system) ; Hamidreza Taghavi (Institutionen för signaler och system, Medicinska signaler och system) ; Måns Eeg-Olofsson
International journal of audiology (1708-8186). Vol. 53 (2014), 6, p. 360-369.
[Artikel, refereegranskad vetenskaplig]

Objective: Bone conduction (BC) stimulation closer to the cochlea has previously been shown to give higher cochlear promontory acceleration measured by laser Doppler vibrometry (LDV). This study is investigating whether stimulation closer to the cochlea also gives improved hearing sensitivity. Furthermore, the study compares shifts in hearing sensitivity (BC thresholds) and ear-canal sound pressure (ECSP). Design: BC hearing thresholds and ECSP have been measured for stimulation at two positions: the existing bone-anchored hearing aid (BAHA) position, and a new bone conduction implant (BCI) position that is located closer to the cochlea. Study sample: The measurements were made on 20 normal-hearing subjects. Results: Depending on frequency, the ipsilateral hearing threshold was 3-14 dB better, and the ipsilateral ECSP was 2-12 dB higher for the BCI than for the BAHA position, with no significant differences between threshold and ECSP shifts at group level for most frequencies, and individually only for some subjects. Conclusions: It was found that both the objective ECSP and the subjective hearing threshold measurements gave similar improvement as previous LDV measurements for stimulation closer to the cochlea. One exception was that the LDV measurements did not show the improved sensitivity for frequencies below 500 Hz found here.

Nyckelord: Bone conduction, hearing sensitivity, transcutaneous stimulation, bone conduction implant, bone-anchored hearing aid, threshold shift, ear-canal sound pressure, objective measure, normal-hearing subjects

Denna post skapades 2014-04-17. Senast ändrad 2016-06-29.
CPL Pubid: 196872


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Institutioner (Chalmers)

Institutionen för signaler och system, Medicinska signaler och system (2005-2017)
Institutionen för kliniska vetenskaper, sektionen för anestesi, biomaterial och ortopedi, Avdelningen för öron-, näs- och halssjukdomar (GU)



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