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Original Articles

Reference hearing threshold levels for short duration signals

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Pages 665-674 | Received 15 Feb 2008, Published online: 07 Jul 2009
 

Abstract

Hearing thresholds for clicks and tonebursts were measured on 26 otologically normal persons (age 18–25 years) using the earphones Sennheiser HDA 200 and Telephonics TDH 39. The test signals are specified in IEC 60645-3 and in ISO 389-9. The acoustic test signals were presented both as a single stimulus and as repeated stimuli with the repetition rate of 20 Hz. The frequencies used for the toneburst were: 250, 500, 1000, 2000, 3000, 4000, 6000, and 8000 Hz. Test signals and measurement methods were all in accordance with the recommendations given in ISO 389-9: Preferred test conditions for the determination of reference hearing threshold levels. The results are given as peak-to-peak equivalent threshold sound pressure levels (peETSPL). The results are in good agreement with other sparse results from literature and are part of the basis for the ISO 389-6 standard from 2007.

Abbreviations
ETSPL=

Equivalent threshold sound pressure levels

RETSPL=

Reference equivalent threshold sound pressure level

Abbreviations
ETSPL=

Equivalent threshold sound pressure levels

RETSPL=

Reference equivalent threshold sound pressure level

Sumario

Se midieron los niveles umbral para clics y bursts tonales en 26 personas otológicamente normales (edad 18-25 años) utilizando auriculares Sennheiser HDA 200 y Telephonics TDH 39. Las señales de prueba están especificadas en IEC 60645-3 y en ISO 389-9. Se presentaron las señales acústicas tanto como un estímulo único o como un estímulo repetido, con una tasa de repetición de 20Hz. Las frecuencias utilizadas para los bursts tonales fueron 250, 500, 1000, 2000, 3000, 4000, 6000 y 8,000 Hz. Las señales de prueba y los métodos de medición estuvieron de acuerdo con las recomendaciones de ISO 389-9: condiciones preferidas para la determinación de los niveles de audición de referencia. Los resultados se dan en umbral de presión sonora pico-a-pico equivalente (peETSPL). Los resultados están en concordancia con los escasos resultados que hay en la literatura y son parte de la base para el estándar ISO 389-6 del 2007.

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