Categorical loudness scaling in cochlear implant recipients.

Abstract:

OBJECTIVE:This study investigated categorical loudness scaling in a large group of cochlear implant (CI) recipients. DESIGN:Categorical loudness was measured for individually determined sets of current amplitudes on apical, mid and basal electrodes of the Nucleus array. STUDY SAMPLE:Thirty adult subjects implanted with the Nucleus CI. RESULTS:Subjects were generally reliable in categorical loudness scaling. As expected, current levels eliciting the same loudness categories differed across subjects and electrodes in many cases. After scaling the electric levels to remove differences in dynamic ranges across subjects and electrodes, the across-subject loudness functions for the three electrodes were very similar. CONCLUSIONS:Scaled electric current to remove differences in dynamic range, as implemented in the Nucleus processor, ensures uniform loudness across the array and CI recipients. The results also showed that categorical loudness scaling for electric stimulation was similar to that for acoustic stimulation in normal hearing subjects. These findings could be used as a guide for aligning electric and acoustic loudness in CI recipients with contralateral hearing.

journal_name

Int J Audiol

authors

Busby PA,Au A

doi

10.1080/14992027.2017.1339129

subject

Has Abstract

pub_date

2017-11-01 00:00:00

pages

862-869

issue

11

eissn

1499-2027

issn

1708-8186

journal_volume

56

pub_type

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