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Research Article

An adaptive clinical test of temporal resolution: Within-channel and across-channel gap detection

, , , &
Pages 375-384 | Received 21 Oct 2009, Accepted 24 Dec 2010, Published online: 08 Feb 2011
 

Abstract

Abstract

Objective: Several methods exist to measure temporal resolution in a clinical setting. The Adaptive Tests of Temporal Resolution (ATTR©) are unique in that they incorporate an adaptive psychophysical procedure to present stimuli via computer sound card. The purpose of this study was to determine if ATTR gap detection thresholds (GDTs) were stable across presentation levels (80 dB SPL, listener-selected level) and sound cards (high-end, inexpensive). Design: GDTs were measured using three conditions of the ATTR: broad-band noise within-channel (BBN-WC), narrowband noise within-channel (NBN-WC), and narrowband noise across-channel (NBN-AC). Analysis of the acoustical properties of ATTR stimuli was made by measuring the electrical signals produced by each sound card. Study Sample: Participants were 30 young adults with normal hearing. Results: The ATTR GDTs did not differ between presentation levels for all three stimulus conditions. Also, neither ATTR stimuli nor ATTR GDTs differed between sound cards for all conditions. Conclusions: The ATTR may be used in a clinical setting with a relatively inexpensive sound card and listener-selected levels. Normative performance values for each ATTR condition are provided.

Sumario

Objetivo: Existen varios métodos en la clínica para medir la resolución temporal. La prueba adaptativa para la resolución temporal (ATTR@) es u´nica en el sentido en que incorpora un procedimiento psico-físico para presentar estímulos por medio de una tarjeta de sonidos de una computadora. El propósito de este estudio fue determinar si los umbrales de detección de brechas (GDT) de la ATTR eran estables en diferentes niveles de presentación (80 dB SPL, nivel seleccionado por el oyente) y con diferentes tarjetas de sonido (hig-end, barata). Diseño: Los GDT fueron medidos en tres condiciones de ATTR: banda ancha, ruido en el canal (BBN-WC), ruido de banda angosta en el canal (NBN-WC) y ruido de banda angosta a través del canal (NBN-AC). El análisis de las propiedades acústicas de los estímulos de ATTR fue realizado midiendo las señales eléctricas producidas por cada tarjeta de sonido. Muestra: Los participantes fueron 30 adultos jóvenes con audición normal. Resultados: Los GDT ATTR no difirieron en los niveles de presentación en las tres condiciones de estímulo. Además, ni los estímulos de ATTR ni los GDT ATTR difirieron en con las diferentes tarjetas de sonido en todas las condiciones. Conclusiones: Los ATTR pueden ser utilizados en condiciones clínicas con una tarjeta de sonido relativamente barata y a niveles seleccionados por el oyente. Se proporcionan los valores normativos de desempeño para cada condición de ATTR.

Acknowledgments

Portions of the data presented in this article were presented at the Florida Academy of Audiology meeting in Orlando, and the American Academy of Audiology convention in Charlotte in 2008.

Declaration of interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper. The Adaptive Tests of Temporal Resolution (ATTR) is not a commercial product sold for profit; it is available at no charge from the developers, Drs. Lister and Roberts.

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