This study examines whether different types of sounds can help reduce pain in people with fibromyalgia, a chronic condition that causes widespread pain and increased sensitivity to sensory experiences. Fibromyalgia affects approximately 2-3% of the global population and has limited treatment options. Recent research suggests that environmental sounds might have the capacity to influence pain perception, but their effects in chronic pain conditions remain largely unexplored. Such research could lead to new, non-invasive, sound-based approaches for managing fibromyalgia pain and inform the design of healthier acoustic environments for people with chronic pain conditions. The study will compare four different sound environments: natural soundscapes (like birdsong and rainfall), urban soundscapes (like traffic and background conversation), broadband sounds (white or pink noise), and silence (as a neutral/control condition with intended placebo effect). Researchers want to know if these different sound environments can change how people with fibromyalgia experience pain and if some environmental sounds might be more helpful than others. Each participant will experience all four sound conditions in a random order, with one session per week over four weeks. With this study design, each participant acts as their own control, which reduces differences between individuals and increases the reliability of the results. During each 20-minute session, participants will listen to the assigned sounds through a high-fidelity sound reproduction setup using headphones while lying comfortably on a padded therapy table in a controlled laboratory setting. Before and after each sound exposure, researchers measure pain intensity and sensitivity using standardized assessments to determine whether and how different sound environments, if any, might offer pain relief.