Evaluation technique for the aided threshold of a hearing instrument using the Japanese count-the-dots audiogram

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  • 日本語 Count-the-Dots Audiogram を利用した補聴器の装用状態の評価法

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Abstract

<p>　 The long-term average speech spectrum (LTASS) of the Japanese language was calculated from digital records of free conversations of 10 female adults. Furthermore, to calculate the band importance factor (BIF), we measured the word discrimination score using audiometric frequency band-filtered monosyllabic sounds in 20 adults with normal hearing. From these results, we drew constructed a Japanese count-the-dots audiogram (CDA). Then, we measured the average hearing threshold (4 division method), aided threshold, and maximum word intelligibility score when wearing the hearing aid in 14 hearing aid wearers. Finally, we calculated the speech AI (Articulation Index) and the number of audible dots using the CDA counted from their aided thresholds. Our results revealed that the number of CDA dots was very strongly correlated (R2=0.7831) with the maximum speech intelligibility score. Thus, counting the dots on the Japanese CDA appears to be a clinically valid tool to evaluate the effect of amplification.</p>

Journal

  • AUDIOLOGY JAPAN

    AUDIOLOGY JAPAN 66 (4), 255-263, 2023-08-30

    Japan Audiological Society

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