Abstract
Pure-tone audiometric test can reflect decrease of auditory sensibility at certain frequencies for the hearing loss; however, it requires critical environment and not suitable for the self-test in general environment, e.g., for some related applications on smart equipments. This study was aimed to evaluate the frequency-dependent hearing loss by words identification tests. Thirty-nine word-pairs in Mandarin Chinese were selected according the vowels/consonants confusion matrix. Every word is a monosyllable with CV (consonant-vowel) structure, and in each pair, the two words are easily confused by their formants (the same consonant conjunct with two different vowels) or the formant transitions (two different consonants conjunct with the same vowel). Hearing loss was simulated by band-stop filtering with different center frequencies. Eight filtering conditions, corresponding to eight center frequencies of the band-stop filter, were tested for nine normal hearing young students. The results show the word identification was significantly decreased for one certain filtering condition (worst-performance frequency, WPF) for 16 word-pairs, indicating these word-pairs could be effective to evaluate the frequency range of hearing loss. The relation of the WPF and the formant/formant transition frequencies were analyzed and discussed.
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