Prior studies have demonstrated musicianship enhancements of various aspects of auditory and cognitive processing in older adults, but musical training has not been examined as an intervention for mitigating age-related declines in these abilities. The current study investigates whether ten weeks of choir participation can improve aspects of auditory processing in older adults, particularly speech-in-noise (SIN) perception. Three groups of participants underwent pre- and post-testing: choir singing (n=50), music appreciation (n=13), and an age- and audiometry-matched control group (n=32). Linear mixed effects modelling in a multilevel regression analysis showed that choir participants demonstrated the most improvements across auditory measures. Choir participants’ gains in SIN perception were partially mediated by pitch discrimination, suggesting a possible mechanism for this perceptual improvement. These findings support the hypothesis that short-term choir participation is an effective intervention for mitigating age-related hearing losses.