Bergefurt and teammates report that “To date, most studies on sound masking are short-term laboratory studies. . . . The current study aims to evaluate, using a longitudinal field study . . . at two organizations, whether level-adaptive sound masking could reduce intelligible speech and increase mental health, while being exposed to level-adaptive sound masking for two to three months. The study consists of two subjective measurements, prior- and post-intervention, using survey questions on coping strategies, noise distraction, and ten…