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      Effect of experimentally introduced interaural frequency mismatch on sentence recognition in bilateral cochlear-implant listeners

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          Abstract

          Bilateral cochlear-implant users experience interaural frequency mismatch because of asymmetries in array insertion and frequency-to-electrode assignment. To explore the acute perceptual consequences of such mismatch, sentence recognition in quiet was measured in nine bilateral cochlear-implant listeners as frequency allocations in the poorer ear were shifted by ±1.5, ±3, and ±4.5 mm using experimental programs. Shifts in frequency allocation >3 mm reduced bilateral sentence scores below those for the better ear alone, suggesting that the poorer ear interfered with better-ear perception. This was not a result of fewer active channels; deactivating electrodes without frequency shifting had minimal effect.

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          The Montreal Cognitive Assessment, MoCA: a brief screening tool for mild cognitive impairment.

          Ziad S Nasreddine, Natalie Phillips, Valérie Bédirian … (2005)
          To develop a 10-minute cognitive screening tool (Montreal Cognitive Assessment, MoCA) to assist first-line physicians in detection of mild cognitive impairment (MCI), a clinical state that often progresses to dementia. Validation study. A community clinic and an academic center. Ninety-four patients meeting MCI clinical criteria supported by psychometric measures, 93 patients with mild Alzheimer's disease (AD) (Mini-Mental State Examination (MMSE) score > or =17), and 90 healthy elderly controls (NC). The MoCA and MMSE were administered to all participants, and sensitivity and specificity of both measures were assessed for detection of MCI and mild AD. Using a cutoff score 26, the MMSE had a sensitivity of 18% to detect MCI, whereas the MoCA detected 90% of MCI subjects. In the mild AD group, the MMSE had a sensitivity of 78%, whereas the MoCA detected 100%. Specificity was excellent for both MMSE and MoCA (100% and 87%, respectively). MCI as an entity is evolving and somewhat controversial. The MoCA is a brief cognitive screening tool with high sensitivity and specificity for detecting MCI as currently conceptualized in patients performing in the normal range on the MMSE.
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            Better speech recognition with cochlear implants.

            B S Wilson, C C Finley, D. Lawson … (1991)
            HIGH levels of speech recognition have been achieved with a new sound processing strategy for multielectrode cochlear implants. A cochlear implant system consists of one or more implanted electrodes for direct electrical activation of the auditory nerve, an external speech processor that transforms a microphone input into stimuli for each electrode, and a transcutaneous (rf-link) or percutaneous (direct) connection between the processor and the electrodes. We report here the comparison of the new strategy and a standard clinical processor. The standard compressed analogue (CA) processor presented analogue waveforms simultaneously to all electrodes, whereas the new continuous interleaved sampling (CIS) strategy presented brief pulses to each electrode in a nonoverlapping sequence. Seven experienced implant users, selected for their excellent performance with the CA processor, participated as subjects. The new strategy produced large improvements in the scores of speech reception tests for all subjects. These results have important implications for the treatment of deafness and for minimal representations of speech at the auditory periphery.
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              IEEE Recommnded Pratice for Speech Quality Measurements

              (1969)
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                Author and article information

                Contributors
                Miranda Cleary
                Kristina DeRoy Milvae:
                ORCID: https://orcid.org/0000-0002-7069-2474
                Nicole Nguyen
                Joshua G. W. Bernstein:
                ORCID: https://orcid.org/0000-0001-7728-2251
                Matthew J. Goupell:
                ORCID: https://orcid.org/0000-0003-2662-3057
                Journal
                Journal ID (nlm-ta): JASA Express Lett
                Journal ID (iso-abbrev): JASA Express Lett
                Journal ID (coden): JELAAE
                Title: Jasa Express Letters
                Publisher: Acoustical Society of America
                ISSN (Electronic): 2691-1191
                Publication date (Print): April 2023
                Publication date (Electronic): 03 April 2023
                Publication date PMC-release: 03 April 2023
                Volume: 3
                Issue: 4
                Electronic Location Identifier: 044401
                Affiliations
                [1 ]Department of Hearing and Speech Sciences, University of Maryland , College Park, Maryland 20742, USA
                [2 ]National Military Audiology and Speech Pathology Center, Walter Reed National Military Medical Center , Bethesda, Maryland 20889, USA micleary@ 123456umd.edu , klmilvae@ 123456buffalo.edu , nknguyen@ 123456umd.edu , joshua.g.bernstein.civ@ 123456health.mil , goupell@ 123456umd.edu
                Author notes
                [a)]

                Author to whom correspondence should be addressed.

                [b)]

                Also at: Department of Communicative Disorders and Sciences, University at Buffalo, Buffalo, NY 14214, USA.

                Author information
                https://orcid.org/0000-0002-7069-2474
                https://orcid.org/0000-0001-7728-2251
                https://orcid.org/0000-0003-2662-3057
                Article
                Publisher ID: 10.0017705 Publisher-manuscript ID: JASA-EL-02280
                DOI: 10.1121/10.0017705
                PMC ID: 10080388
                SO-VID: 55e0916e-86e8-483d-8fca-54d6e30fb48c
                Copyright © © 2023 Author(s).
                License:

                2691-1191/2023/3(4)/044401/8

                All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                Date received : 23 December 2022
                Date accepted : 13 March 2023
                Page count
                Pages: 8
                Funding
                Funded by: National Institute on Deafness and Other Communication Disorders 10.13039/100000055
                Award ID: R01DC015798
                Categories
                Subject: Psychological and Physiological Acoustics
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                editor Qian-Jie Fu

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