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Original Article

Occupational hearing loss: screening with distortion-product otoacoustic emissions

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Pages 323-329 | Received 10 Feb 2003, Accepted 02 Jul 2003, Published online: 07 Jul 2009
 

Abstract

Hearing assessment of applicants for occupational hearing loss compensation can be a time-consuming process. An accurate screening procedure that is sensitive to occupational hearing loss may have application in many situations. The present study developed distortion-product otoacoustic emission (DPOAE) screening criteria to identify subjects likely to meet the Hong Kong requirements for occupational hearing loss compensation, namely a bilateral sensorineural loss ≥ 40 dB HL (average of 1000, 2000 and 3000 Hz). The screening criteria of 1500 and/ or 2000 Hz, with a signal-to-noise ratio of >0 or 3 dB, yielded high sensitivity and specificity. DPOAE measures therefore have the potential to accurately indicate possible occupational hearing loss. However, DPOAEs should be used as a screening tool only, as conventional pure-tone audiometry remains the more comprehensive measure of hearing sensitivity.

Sumario

La evaluacio´n auditiva de candidatos a indemnizacio´n por hipoacusia ocupacional puede consumir demasiado tiempo. Un procedimiento certero y sensible para evaluar la hipoacusia ocupacional podri´a aplicarse en muchas situaciones. Este estudio desarrolla los criterios de los productos de distorsio´n (DPOAE) para identificar sujetos que cumplan los requisitos para la compensacio´n por hipoacusia ocupacional de Hong Kong; es decir una hipoacusia bilateral sensorineural ≥40 dB HL (promedio de 1000, 2000 y 3000 Hz). El criterio de identificacio´n de 1500 y/o 2000 Hz con diferencia sen˜al ruido >0o 3 dB demostro´ una alta sensibilidad y especificidad. Por lo tanto, las mediciones de DPOAE tienen un alto potencial para poder identificar una posible hipoacusia ocupacional. Sin embargo, los DPOAE deben ser utilizados solamente como una herramienta de identificacio´n y la audiometri´a tonal convencional sigue siendo la mejor medicio´n de la sensibilidad auditiva.

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