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Acceptable noise level with Danish, Swedish, and non-semantic speech materials

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Abstract Objective: Acceptable noise level (ANL) has been established as a method to quantify the acceptance of background noise while listening to speech presented at the most comfortable level. The aim of the present study was to generate Danish, Swedish, and a non-semantic version of the ANL test and investigate normal-hearing Danish and Swedish subjects' performance on these tests. Design: ANL was measured using Danish and Swedish running speech with two different noises: Speech-weighted amplitude-modulated noise, and multitalker speech babble. ANL was also measured using the non-semantic international speech test signal (ISTS) as speech signal together with the speech-weighted amplitude-modulated noise. The latter condition was identical in both populations. Study sample: Forty Danish and 40 Swedish normal-hearing subjects. Results: In both populations ANL results were similar to previously reported results from American studies. Generally, significant differences were seen between test conditions using different types of noise within ears in each population. Significant differences were seen for ANL across populations, also when the non-semantic ISTS was used as speech signal. Conclusions: The present findings indicate that there are extrinsic factors, such as instructions, affecting the ANL results. Summario Objetivo: Se ha establecido el Nivel de Ruido Aceptable (ANL) como un método para cuantifi car la aceptación de ruido de fondo mientras se escucha lenguaje presentado al nivel más confortable. El objetivo de este estudio fue generar las versiones sueca, danesa y una no-semántica de la prueba ANL e investigar el desempeño de sujetos normoyentes daneses y suecos en estas pruebas. Diseño: Se midió el ANL utilizando un discurso continuo en danés y sueco con dos diferentes ruidos: ruido con amplitud modulada en el rango del lenguaje y balbuceo de varios hablantes. También se midió el ANL utilizando la prueba internacional no-semántica de señal de lenguaje (ISTS) como la señal lingüística junto con ruido con amplitud modulada en el rango del lenguaje. Esta última condición fue idéntica en ambas poblaciones. Muestra: Cuarenta sujetos daneses y 40 sujetos suecos normoyentes. Resultados: en ambas poblaciones los resultados de ANL fueron muy similares a los reportado previamente en estudios americanos. Generalmente, se vieron diferencias signifi cativas para el ANL entre poblaciones, también cuando el ISTS no semántico fue utilizado como señal lingüística. Conclusiones: Estos hallazgos indican que hay factores extrínsecos tales como las instrucciones, que afectan los resultados de ANL.
Original languageEnglish
JournalInternational Journal of Audiology
Volume51
Issue number3
Pages (from-to)146-156
ISSN1499-2027
DOIs
Publication statusPublished - 2012

ID: 33150744