Can individualised acoustical transforms in hearing aids improve perceived sound quality?
This paper presents an experiment which aimed to clarify whether benefits in terms of perceived sound quality can be obtained from fitting hearing aids according to individualised acoustical transforms instead of average transforms. Eighteen normal-hearing test subjects participated, and hearing-aid sound processing with various degrees of individualisation was simulated and applied to five different sound samples. Stimuli were presented over insert phones and evaluated in an A/B test paradigm. Data were analysed with the Bradley-Terry-Luce model. The key result is that hearing aids individualised according to a real-ear insertion gain (REIG) target were preferred over hearing aids individualised according to a real-ear aided response (REAR) target.
Aazh, H., Moore, B.C., and Prasher, D. (2012). “Real ear measurement methods for open fit hearing aids: Modified pressure concurrent equalization (MPCE) versus modified pressure stored equalization (MPSE),” Int. J. Audiol., 51, 103-107.
Abrams, H.B., Chisolm, T.H., McManus, M., and McArdle, R. (2012). “Initial-fit approach versus verified prescription: Comparing self-perceived hearing aid benefit,” J. Acoust. Soc. Am., 23, 768-778.
Bradley, R.A. and Terry, M.E. (1952). “Rank analysis of incomplete block designs: I. The method of paired comparisons,” Biometrika, 39, 324-345.
Bramsløw, L. (2010). “Preferred signal path delay and high-pass cut-off in open fittings,” Int. J. Audiol., 49, 634-644.
Dillon, H. (2012). Hearing Aids. 2nd ed., Stuttgart, Germany: Thieme.
Dillon, H. and Keidser G. (2003). “Is probe-mic measurement of HA gain-frequency response best practice?,” Hear. J., 56, 28-30.
Humes, L.E. (2012). “Verification and validation: The chasm between protocol and practice,” Hear. J., 65, 8-10.
Luce, R.D. (1959). Individual Choice Behavior: A Theoretical Analysis. New York: Wiley.
Moore, B.C.J. and Tan, C.-T. (2003). “Perceived naturalness of spectrally distorted speech and music,” J. Acoust. Soc. Am., 114, 408-419.
Mueller, H.G. (2014). “20Q: Real-ear probe-microphone measures – 30 years of progress?” Audiology Online, article 12410.
Mueller, H.G. and Picou, E.M. (2010). “Survey examines popularity of real-ear probe-microphone measures,” Hear. J., 63, 27-28.
Nelson, S.R. (2013). “The impact of using real ear measures to calculate prescriptive targets on hearing aid follow-up visits,” Retrieved from: http://digitalcommons.wustl.edu/pacs_capstones/669/
Saunders, G.H. and Morgan, D.E. (2003). “Impact on hearing aid targets of measuring thresholds in dB HL versus dB SPL,” Int. J. Audiol., 42, 319-326.
Schärer, Z. and Lindau, A. (2009). “Evaluation of equalization methods for binaural signals,” Proc. 126th Audio Engineering Society Convention, 1, 15-31.
Seewald, R., Moodie, S., Scollie, S., and Bagatto, M. (2005). “The DSL method for pediatric hearing instrument fitting: Historical perspective and current issues,” Trends Ampl., 9, 145-157.
van Buuren, R.A., Festen, J.M., and Houtgast, T. (1996). “Peaks in the frequency response of hearing aids: Evaluation of the effects on speech intelligibility and sound quality,” J. Speech Lang. Hear. Res., 39, 239-250.
Wickelmaier, F. and Schmid, C. (2004). “A Matlab function to estimate choice model pa-rameters from paired-comparison data,” Behav. Res. Meth. Instr. Comp., 36, 29-40.
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