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Research Articles

LIST and LINT: Sentences and numbers for quantifying speech understanding in severely impaired listeners for Flanders and the Netherlands

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Pages 348-355 | Received 06 Jan 2008, Published online: 07 Jul 2009
 

Abstract

A Dutch sentence test (LIST) and a Dutch number test (LINT) have been developed and validated for the accurate measurement of speech reception thresholds (SRT) in quiet and in noise with severely hearing-impaired individuals and cochlear implant recipients in Flanders and the Netherlands. The LIST consists of 35 lists of 10 sentences of equal known difficulty uttered by a female speaker; while the LINT consists of 400 numbers (1–100) by two male and two female speakers. Normative values were determined at fixed S/N ratios and using the adaptive method (Plomp & Mimpen, Citation), yielding identical results for SRT and slope. For the LIST, average fitted SRTs were 27.1 (0.9) dB SPL in quiet and −7.8 dB (0.2) SNR in noise. In addition, the LIST in noise displayed a steep discrimination function (17%/dB) and good reliability (within-subject standard deviation=1.2 dB). For the LINT average fitted SRTs in quiet were 20.7 (0.9) dB SPL and about −9.0 dB SNR in noise. Again, the slopes of the performance intensity functions were relatively steep, i.e. 8.5%/dB in quiet and 15.2%/dB in noise, suggesting that the LINT is accurate and efficient and thus capable of reflecting subtle changes in performance. First data with cochlear implanted subjects show that both LIST and LINT are feasible and are capable of mapping a large range of hearing disabilities.

Sumario

Una prueba holandesa de frases (LIST) y una prueba holandesa de números (LINT) han sido desarrolladas y validadas para la medición exacta de los umbrales de recepción del lenguaje (SRT) en silencio y en ruido, en individuos con alteración auditiva severa y en receptores de implante coclear, en Flandes y en los Países Bajos. El LIST consiste de 35 listas de 10 frases con igual dificultad conocida presentadas por una hablante femenina, mientras que el LINT consiste de 400 números (1–100) y es presentado por dos hablantes masculinos y dos femeninas. Se determinaron los valores normativos a tasas S/R fijas y utilizando el métodos adaptativo (Plomp & Mimpen, 1979), rindiendo resultados idénticos en cuanto al SRT y la pendiente. Para el LIST, los SRT amplificados promedio fueron 27.1 (0.9) dB SPL en silencio y −7.8 dB (0.2) SNR en ruido. Además, el LIST en ruido mostró una función de discriminación empinada (17 %/dB) y una buena confiabilidad (desviación estándar intra-sujeto=1.2 dB). Para el LINT, los SRT promedio en silencio con amplificación fueron de 20.7 (0.9) dB SPL y alrededor de −9.0 dB de SNR en ruido. De nuevo, las pendientes de las funciones de desempeño/intensidad fueron relativamente empinada, p.e., 8.5 %/dB en silencio y 15.2 %/dB en ruido, sugiriendo que el LINT es exacto y eficiente, y por lo tanto, capaz de cambios sutiles en el desempeño. Los primeros datos con sujetos con implante coclear muestran que tanto el LIST como el LINT son factibles y capaces de mapear una amplio rango de discapacidades auditivas.

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