Ipsilateral masking between acoustic and electric stimulations

Payton Lin; Christopher W Turner; Bruce J Gantz; Hamid R Djalilian; Fan-Gang Zeng

doi:10.1121/1.3605294

Back

Ipsilateral masking between acoustic and electric stimulations

Journal article

Open access

Peer reviewed

Ipsilateral masking between acoustic and electric stimulations

Payton Lin, Christopher W Turner, Bruce J Gantz, Hamid R Djalilian and Fan-Gang Zeng

The Journal of the Acoustical Society of America, Vol.130(2), pp.858-865

08/2011

DOI: 10.1121/1.3605294

PMCID: PMC3190656

PMID: 21877801

Files and links (1)

url

https://doi.org/10.1121/1.3605294View

Published (Version of record) Open Access

Abstract

Residual acoustic hearing can be preserved in the same ear following cochlear implantation with minimally traumatic surgical techniques and short-electrode arrays. The combined electric-acoustic stimulation significantly improves cochlear implant performance, particularly speech recognition in noise. The present study measures simultaneous masking by electric pulses on acoustic pure tones, or vice versa, to investigate electric-acoustic interactions and their underlying psychophysical mechanisms. Six subjects, with acoustic hearing preserved at low frequencies in their implanted ear, participated in the study. One subject had a fully inserted 24 mm Nucleus Freedom array and five subjects had Iowa/Nucleus hybrid implants that were only 10 mm in length. Electric masking data of the long-electrode subject showed that stimulation from the most apical electrodes produced threshold elevations over 10 dB for 500, 625, and 750 Hz probe tones, but no elevation for 125 and 250 Hz tones. On the contrary, electric stimulation did not produce any electric masking in the short-electrode subjects. In the acoustic masking experiment, 125-750 Hz pure tones were used to acoustically mask electric stimulation. The acoustic masking results showed that, independent of pure tone frequency, both long- and short-electrode subjects showed threshold elevations at apical and basal electrodes. The present results can be interpreted in terms of underlying physiological mechanisms related to either place-dependent peripheral masking or place-independent central masking.

Cochlear Implants

Psychoacoustics

Electric Stimulation

Acoustic Stimulation

Humans

Middle Aged

Persons With Hearing Impairments - rehabilitation

Correction of Hearing Impairment - psychology

Prosthesis Design

Auditory Threshold

Persons With Hearing Impairments - psychology

Perceptual Masking

Cochlear Implantation - instrumentation

Adult

Audiometry, Pure-Tone

Auditory Pathways - physiopathology

Aged

Auditory Perception

Details

Title: Subtitle: Ipsilateral masking between acoustic and electric stimulations
Creators: Payton Lin - Department of Biomedical Engineering, University of California, Irvine, CA 92617, USA. paytonl@uci.edu
Christopher W Turner
Bruce J Gantz
Hamid R Djalilian
Fan-Gang Zeng
Resource Type: Journal article
Publication Details: The Journal of the Acoustical Society of America, Vol.130(2), pp.858-865
DOI: 10.1121/1.3605294
PMID: 21877801
PMCID: PMC3190656
NLM abbreviation: J Acoust Soc Am
ISSN: 0001-4966
eISSN: 1520-8524
Publisher: American Institute of Physics; United States
Grant note: P50 DC00242 / NIDCD NIH HHS P30 DC008369 / NIDCD NIH HHS P50 DC000242 / NIDCD NIH HHS R01 DC008858 / NIDCD NIH HHS R01 DC000377 / NIDCD NIH HHS
Language: English
Date published: 08/2011
Academic Unit: Communication Sciences and Disorders; Neurosurgery; Otolaryngology
Record Identifier: 9984007191702771

Metrics

19 Record Views

34 Times Cited - Web of Science