| Clinical evaluation of a new hearing aid anti-cardioid directivity pattern. | |
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MedLine Citation:
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PMID: 21271803 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Abstract Objective: The purpose of this research was to evaluate a new directional hearing aid algorithm which automatically adapts to an anti-cardioid pattern in background noise when a speech signal originates from behind the hearing aid user. Design: Using the hearing-in-noise-test (HINT) in the soundfield, with the sentences delivered adaptively from the back (180°) and the standard HINT competing noise from the front (0°; 72 dB SPL), the participants were tested for three different hearing aid conditions: omnidirectional, conventional adaptive directional, and adaptive directional with the anti-cardioid algorithm enabled. Study Sample: Adults (n = 21) with bilaterally symmetrical downward sloping sensorineural hearing loss; experienced hearing aid users and aided bilaterally for experimental testing. Results: Results revealed a significant effect for the hearing aid microphone setting (p < .0001), with a HINT mean RTS of 4.2 dB for conventional adaptive directional, -0.1 dB for omnidirectional, and -5.7 dB when the anti-cardioid algorithm was active. This was a large effect size (Cohen's f2). Conclusion: The findings suggest that the signal classification system steered the algorithm correctly, and that when implemented, the anti-cardioid polar pattern resulted in an improvement in speech recognition in background noise for this listening situation. Sumario Objetivo: El propósito de esta investigación fue evaluar un nuevo algoritmo para auxiliares auditivos direccionales que se adapta automáticamente a un patrón anti-cardioide en ruido de fondo cuando una señal de lenguaje se origina detrás del usuario de un auxiliar auditivo. Diseño: Usando la prueba de audición-en-ruido (HINT), en campo libre, con oraciones enviadas adaptativamente desde atrás (180°) y el HINT estándar con ruido competitivo desde el frente (0°; 72 dB SPL), los participantes fueron evaluados en tres diferentes condiciones de escucha: omnidireccional, direccional adaptativa convencional y adaptativa direccional con el algoritmo anti-cardioide habilitado. Muestra de estudio: Adultos (n = 21) con pérdida auditiva bilateral simétrica, sensorineural, de perfil descendente, con experiencia en el uso de auxiliares auditivos y con adaptación bilateral para la prueba experimental. Resultados: Los resultados revelaron un efecto significativo para el ajuste del micrófono del auxiliar auditivo (p < .0001), con una HINT media y RTS de 4.2 dB para la forma direccional convencional adaptativa, -0.1 dB para la omnidireccional y -5.7 dB cuando se habilitóel algoritmo anti-cardioide. Este fue un efecto de gran envergadura (Cohen's f2). Conclusión: Los hallazgos sugieren que el sistema de clasificación de señales conducen el algorritmo correctamente y que cuando es habilitado, el patrón polar anti-cardioide determina una mejoría en el reconocimiento del lenguaje con ruido de fondo en esta situación de escucha. |
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Authors:
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H Gustav Mueller; Jennifer Weber; Martina Bellanova |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-1-27 |
Journal Detail:
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Title: International journal of audiology Volume: - ISSN: 1708-8186 ISO Abbreviation: - Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-1-28 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101140017 Medline TA: Int J Audiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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*Department of Hearing and Speech Sciences, Vanderbilt University, Nashville, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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