How to quantify binaural hearing in patients with unilateral hearing using hearing implants
SourceAudiology and Neuro-Otology, 20 Suppl 1, (2015), pp. 44-7
Article / Letter to editor
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Audiology and Neuro-Otology
vol. 20 Suppl 1
SubjectRadboudumc 0: Other Research DCMN: Donders Center for Medical Neuroscience
Application of bilateral hearing devices in bilateral hearing loss and unilateral application in unilateral hearing loss (second ear with normal hearing) does not a priori lead to binaural hearing. An overview is presented on several measures of binaural benefits that have been used in patients with unilateral or bilateral deafness using one or two cochlear implants, respectively, and in patients with unilateral or bilateral conductive/mixed hearing loss using one or two percutaneous bone conduction implants (BCDs), respectively. Overall, according to this overview, the most significant and sensitive measure is the benefit in directional hearing. Measures using speech (viz. binaural summation, binaural squelch or use of the head shadow effect) showed minor benefits, except for patients with bilateral conductive/mixed hearing loss using two BCDs. Although less feasible in daily practise, the binaural masking level difference test seems to be a promising option in the assessment of binaural function.
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