Speech-in-noise (SIN) perception—the ability to understand speech in challenging listening environments—is vital for effective communication. Even among individuals with normal hearing, SIN difficulties can impact daily life and social participation. Previous research has implicated both auditory and cognitive factors in SIN perception, yet their relative contributions remain debated. The present study examined these relationships in 75 adults with normal hearing using a comprehensive behavioural battery. Auditory measures included Frequency Difference Limen (FDL) and Gap Detection Threshold (GDT), while cognitive measures included Auditory Working Memory (AWM), Auditory Stroop, and the Sustained Attention to Response Task (SART). Spearman correlations showed that SIN performance correlated negatively with FDL (ρ = –0.47, p < .001) and positively with AWM (ρ = 0.37, p = .001), indicating that better frequency discrimination and stronger working memory are linked to improved SIN understanding. Stroop (ρ = 0.26, p = .023) and GDT (ρ = 0.22, p = .059) showed weaker or marginal associations. To assess the unique contributions of these variables, a multiple regression analysis was conducted. Both FDL (p = 1.9e–05) and AWM (p = 0.006) emerged as significant predictors of SIN performance, together explaining 36% of the variance (R² = 0.36, p < .001). In contrast, Stroop and GDT were not significant predictors when included in the model. These preliminary findings suggest that both auditory and cognitive mechanisms contribute to speech-in-noise perception, with frequency discrimination exerting the strongest influence and auditory working memory providing additional support. However, the study is ongoing, and further data collection—including additional tests like EEG recordings—is expected to provide deeper insights into the underlying mechanisms of SIN perception.