Selective Auditory Attention Engages Distinct Neural Strategies in Simulated Electric and Acoustic Stimulation Within and Across Ears

OBJECTIVES: This study aimed to investigate whether electric-acoustic stimulation (EAS) and bimodal stimulation (BS) rely on similar or distinct neural mechanisms to support attention-driven speech comprehension in noisy environments.

Clinicians fitting EAS or bimodal devices should be aware that these stimulation modes recruit distinct neural attention strategies, which may have future implications for candidacy selection and auditory training protocols, though no immediate protocol change is warranted from this single study.

Understanding the separate neural mechanisms underpinning selective attention in EAS versus bimodal users could guide future device fitting strategies and rehabilitation approaches for cochlear implant recipients.

1. 01EAS (combined electric and acoustic stimulation in one ear) and bimodal stimulation (cochlear implant + contralateral hearing aid) engage distinct neural strategies for selective auditory attention.
2. 02Neural strategy differences were most pronounced for cross-ear (dichotic) attention tasks.
3. 03Findings were based on simulated, not real, electric and acoustic stimulation conditions.
4. 04Study published in Ear and Hearing, a leading peer-reviewed audiology journal.
5. 05Results may inform future auditory rehabilitation and device fitting practices for cochlear implant users.

PMID

42271547

DOI

10.1097/AUD.0000000000001851.

Journal

Ear and Hearing

Publication type

research_article

Evidence level

2b

Population

Participants with hearing loss tested under simulated electric-acoustic and bimodal stimulation conditions

Intervention

Simulated electric-acoustic stimulation (EAS) and bimodal stimulation during selective auditory attention tasks

Comparator

Comparison between EAS and bimodal stimulation conditions; within- and across-ear attention tasks