Relative importance of different spectral bands to consonant identification: relevance for frequency transposition in hearing aids.

International Journal of Audiology
D A VickersBrian C J Moore

Abstract

Listeners with high-frequency dead regions (DRs) benefit from amplification of frequencies up to 1.7 times the edge frequency, f(e), of the DR. Better consonant identification might be achieved by replacing the band from f(e) to 1.7f(e) with a higher spectral band. We aimed to identify the optimal band, using simulations with normal-hearing listeners. In experiment 1, nonsense syllables were lowpass filtered to simulate DRs with f(e) of 0.5, 0.75, and 1.0 kHz. Identification was measured for each of these base bands alone and with a bandpass-filtered band added (but not transposed). The added band either extended from f(e) to 1.7f(e) or its center frequency was increased, keeping bandwidth fixed in ERB(N)-number. Performance improved with increasing center frequency and then reached an asymptote or declined. Experiment 2 used a mid-frequency base band, and a lower-frequency added band. The results also showed a beneficial effect of frequency separation of the added and base bands. Experiment 3 resembled experiment 1, but with bandwidth fixed in Hertz. For higher-frequency added bands, the benefit was lower than for experiment 1.

References

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Dec 16, 2004·Ear and Hearing·Brian C J MooreMichael A Stone
Jul 16, 2005·The Journal of the Acoustical Society of America·Martina Huss, Brian C J Moore
Dec 1, 2005·International Journal of Audiology·Martina Huss, Brian C J Moore
Dec 13, 2005·The Journal of the Acoustical Society of America·Richard M WarrenPeter W Lenz
Apr 6, 2007·The Journal of the Acoustical Society of America·Michael A Stone, Brian C J Moore
May 15, 2007·Ear and Hearing· Vinay, Brian C J Moore

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Citations

Jun 21, 2011·The Journal of the Acoustical Society of America·Jayaganesh Swaminathan, Michael G Heinz
Nov 18, 2011·The Journal of the Acoustical Society of America·Michael A StoneBrian C J Moore
Aug 3, 2010·International Journal of Audiology·Christian FüllgrabeBrian C J Moore
Jul 22, 2018·Trends in Hearing·Christian FüllgrabeBrian C J Moore

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