A comparison of NAL and DSL prescriptive methods for paediatric hearing-aid fitting: predicted speech intelligibility and loudness

International Journal of Audiology
Teresa Y C ChingChristopher Flynn

Abstract

To examine the impact of prescription on predicted speech intelligibility and loudness for children. A between-group comparison of speech intelligibility index (SII) and loudness, based on hearing aids fitted according to NAL-NL1, DSL v4.1, or DSL m[i/o] prescriptions. A within-group comparison of gains prescribed by DSL m[i/o] and NAL-NL2 for children in terms of SII and loudness. Participants were 200 children, who were randomly assigned to first hearing-aid fitting with either NAL-NL1, DSL v4.1, or DSL m[i/o]. Audiometric data and hearing-aid data at 3 years of age were used. On average, SII calculated on the basis of hearing-aid gains were higher for DSL than for NAL-NL1 at low input level, equivalent at medium input level, and higher for NAL-NL1 than DSL at high input level. Greater loudness was associated with DSL than with NAL-NL1, across a range of input levels. Comparing NAL-NL2 and DSL m[i/o] target gains revealed higher SII for the latter at low input level. SII was higher for NAL-NL2 than for DSL m[i/o] at medium- and high-input levels despite greater loudness for gains prescribed by DSL m[i/o] than by NAL-NL2. The choice of prescription has minimal effects on speech intelligibility predictions but marked effects on...Continue Reading

References

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Citations

Dec 14, 2016·International Journal of Audiology·Birger Kollmeier, Jürgen Kiessling
Jul 9, 2017·International Journal of Audiology·Teresa Yc ChingPatricia Van Buynder
Dec 7, 2019·International Journal of Audiology·Frank M DigeserUlrich Hoppe
Dec 20, 2013·International Journal of Audiology·Teresa Y C Ching, Harvey Dillon
Jun 4, 2018·Journal of Medical Systems·S RajkumarS S Vignesh

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