###### Abstract  
Among the temporal elements in the autocorrelation function, the effective duration (\(\tau_{\rm e}\)) is a useful indicator of speech recognition for patients with sensorineural hearing impairment. We assessed the influence of speech recognition performance on the relationship between the percentage of accurately perceived articulation and the median \(\tau_{\rm e}\) (\(\tau_{\rm e}\)-med) and the relationship between monosyllabic confusion and the \(\tau_{\rm e}\)-med. Significant correlations were observed between the articulation percentage and the average \(\tau_{\rm e}\)-med in groups with high, middle, and low speech recognition scores (SRSs). Two-factor mixed analysis of variance revealed significant main effects for the condition (presentation/response). There was no significant main effect for group (high-, middle-, or low-SRS) scores and no significant interaction between the groups. The average \(\tau_{\rm e}\)-med of the response was significantly longer than that of the presentation in all three groups. Monosyllabes with short \(\tau_{\rm e}\)-med values tended to be misheared as monosyllabes with a long \(\tau_{\rm e}\)-med when confusion occurred. The \(\tau_{\rm e}\)-med was useful for estimating monosyllabes that patients with sensorineural hearing impairment find easy to listen to, independent of speech recognition performance. sensorineural hearing loss; median effective duration (\(\tau_{\rm e}\)); speech recognition score +
Footnote †: journal: Medical  
are strongly related to the timing of nerve firings caused by binaurally detected sounds, and the ACF is modeled on the processors of the auditory nerve [11; 12]. Some parameters can be calculated from ACF analyses of monosyllables. These ACF parameters are frequently used for music and acoustics in concert halls [13] and for the evaluation of several types of noise [12; 13; 14; 15; 16; 17; 18]. Some studies analyzed the factors of ACF in relation to speech intelligibility in people with normal hearing in different sound-field transmissions [19; 20]. Among the temporal elements of ACF, the effective duration (\(\tau_{\text{e}}\)) reflects the stability of the temporal pattern of sound waves [21]. As mentioned, [PERSON] et al. [7] analyzed the relationship between speech recognition and the median \(\tau_{\text{e}}\) (\(\tau_{\text{e}}\)-med) in patients with sensorineural hearing impairment and showed that the \(\tau_{\text{e}}\)-med was strongly correlated with the percentage of correctly perceived articulations of consonants. Furthermore, they showed unidirectional confusion patterns among consonants that were acoustically similar and reported that patients with sensorineural hearing impairment had a higher tendency to mishear consonants with a short \(\tau_{\text{e}}\)-med for consonants with a long \(\tau_{\text{e}}\)-med [7]. Therefore, the \(\tau_{\text{e}}\)-med may be a useful indicator of sensorineural hearing impairment. Since speech recognition levels vary across patients, the relationship between the percentage of accurately perceived articulation and the \(\tau_{\text{e}}\)-med may also vary depending on speech recognition. Therefore, this relationship may not be applicable to all patients with sensorineural hearing impairment. It is necessary to determine whether this relationship is present in all individuals with sensorineural hearing impairments who have different levels of speech recognition performance. However, to the best of our knowledge, no previous study examined the influence of speech recognition performance on the relationship between the percentage of accurately perceived articulation and the \(\tau_{\text{e}}\)-med. Hence, we assessed the influence of speech recognition performance on this relationship. In addition, similar to previous studies that examined confusion patterns among acoustically similar consonants, the present study evaluated the relationship between monosyllabic confusion and the \(\tau_{\text{e}}\)-med and explored the influence of speech recognition performance on this relationship.