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Original Articles

AMTAS®: Automated method for testing auditory sensitivity: II. Air conduction audiograms in children and adults

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Pages 434-439 | Received 18 Oct 2010, Accepted 03 Jan 2011, Published online: 18 Mar 2011
 

Abstract

Abstract

Objective: This study was designed to evaluate an automated pure-tone audiometric procedure (AMTAS®) for 4–8 year-old children, and a quality assessment method (QUALIND®) that predicts the accuracy of the test. Design: Children were tested with AMTAS and conventional manual air-conduction audiometry. A group of adults was tested for comparison. Study sample: Eighty-one 4–8 year-old children and 15 adults. Most had normal hearing. Results: For most subjects (93% of adults and 91% of children) differences between AMTAS and manual thresholds were similar to differences that occur when two experienced audiologists test the same subjects. QUALIND detected the inaccurate audiograms with a sensitivity of 71% and a specificity of 91%. When inaccurate audiograms identified by QUALIND are excluded, the accuracy of AMTAS is similar to the accuracy of manual audiometry. Conclusions: AMTAS produces accurate air-conduction audiograms in a high proportion of 4–8 year-old children and adults. QUALIND successfully identified most inaccurate AMTAS audiograms. The method can decrease the cost and increase efficiency and accessibility of hearing testing.

Sumario

Objetivo: Este estudio fue diseñado para evaluar un procedimiento automatizado de evaluación audiométrica de tonos puros (AMTAS®) para niños de 4-8 años y un método de evaluación de calidad (QUALIND™) que predice la exactitud de la prueba. Diseño: Los niños fueron evaluados con el AMTAS y con audiometría convencional manual de conducción aérea. Un grupo de adultos fue evaluado como comparación. Muestra de estudio: Ochenta y un niños de 4–8 años de edad y 15 adultos. La mayoría tenían audición normal. (“la mayoría”: COMO PUEDEN DECIR ESTO, ASI, EN UN ESTUDIO CIENTÍFICO?) Resultados: En la mayoría de los sujetos (93% de los adultos y 91% de los niños) la diferencia entre el AMTAS y los umbrales manuales fue similar a las diferencias que ocurren cuando dos audiólogos de experiencia evalúan al mismo sujeto. QUALIND detectó los audiogramas inexactos con una sensibilidad del 71% y una especificidad del 91%. Cuando se excluyen los audiogramas inexactos identificados por QUALIND, la exactitud de AMTAS es similar a la exactitud de la audiometría manual. Conclusiones: AMTAS produce audiogramas de conducción aérea exactos en una alta proporción de niños de 4–8 años de edad y en adultos. QUALIND identifica con éxito las mayor parte de los audiogramas inexactos obtenidos por AMTAS. El método puede disminuir el costo y aumentar la eficiencia y la accesibilidad para pruebas auditivas.

Acknowledgements

This research was supported by National Institutes of Health Small Business Technology Transfer grants R41DC05110 and R42DC05110; a subcontract from grant #HHSN26020060007C from the National Institutes of Health to Northshore University Health System Research Institute; and by funding from Audiology Incorporated. We are grateful to research audiologist Allison Kohtz for collecting the KIDTAS data presented in this report and to the staff of St. Odilia School for allowing access to their students for this study. AMTAS®, KIDTAS, and QUALIND® intellectual property is owned by the first author and Audiology Incorporated and may become commercial products.

Declaration of interest: The first author declares a conflict of interest that is disclosed in the Acknowledgements section. The second and third authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.

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