목적: The Digits-in-Noise (DiN) test is a widely recognized hearing screening tool, which use a single or series of digits for speech- in-noise measure via a web or smartphone application. Previously, app-based Korean version of DiN test was developed and expended into a PC-based version for better applicability for clinical settings. This study identify the relationship between speech-in-noise (SiN) ability measured by the DiN test and hearing sensitivity in patients with chronic hearing loss (HL). 방법:A total of 28 patients with bilateral sensorineural or mixed HL participated in this study (average age: 71). All the subjects had no hearing aids (HAs) experience. For each subject, we administered a series of tests including audiometry, DiN, and word recognition prior to HAs fitting. The DiN speech reception threshold (SRT) was obtained with the SNR needed for 50% accuracy. The DiN stimuli were presented through headphone to measure individual ears and via a speaker to assess binaural hearing. To determine sensitive clinical indicators of hearing sensitivity, we analyzed better and poor ears separately based on their pure tone average threshold (PTA). Lastly, Pearson- correlation coefficient was conducted to examine relationships among the DiN-SRT, PTA, and word recognition score (WRS). 결과:The DiN-SRTs were higher with poorer hearing sensitivities (r= 0.568, p < 0.01). Meanwhile, the DiN-SRTs were lower as WRSs were higher (r= -0.764, p < 0.01). For the comparison between better and poor ears, we found that DiN-SRTs measured binaurally were related to the hearing sensitivity of the better ear only (r= 0.514, p < 0.01). In addition, the negative correlation was found such that the DiN-SRTs were better for higher WRSs (r= -0.826, p < 0.01). No significant relationships were found for the poor ear. 결론:Considering strong relationships between the Korean DiN and both PTA, and WRS, it indicates a potential as a clinical tool for predicting PTA and SiN perception in individuals with HL. Furthermore, we expect that the Korean DiN could be useful to monitor the behavioral improvements such as SiN and hearing sensitivity following HAs fitting.