In today’s noise-filled urban life, even hiking rarely provides true mental healing. Psith is a forest therapy installation designed to help hikers escape the fatigue of “directed attention”—restoring cognitive function and enhancing physical and mental well-being through nature’s gentle stimuli. The installation is placed at locations along the trail with rich acoustic qualities: platforms, quiet bends, and streamside areas. The design prioritizes sustainability. Psith requires no electricity. Its speaker-like geometry amplifies natural soundscapes with low distortion. Ground anchors replace concrete foundations, securing the structure through soil density and minimizing environmental impact. The installation process includes site surveys, therapeutic efficacy assessments, technical reviews, and final acceptance. Ergonomic and intuitive to use. The speaker-shaped form integrates acoustic textures with listening icons. Recessed shoulder grooves ensure a natural posture. The concrete and steel structure accommodates diverse user needs: adults can sit to listen, children can stand to explore, and the upward-curving platform edges preserve personal space. The experience is extended through digital interaction. Soundscape maps help hikers locate the installations. A pull-tab design allows users to record their impressions on the spot; these scannable recordings let them relive the auditory memories at home and share them with others. Psith’s deeper vision lies on a cultural level: when hikers see the device, they instinctively lower their voices—a collective, unspoken understanding aimed at preserving the forest’s tranquility and making the mountains a true sanctuary for the modern soul.