Influence of audiovisual environments in rehabilitation gardens on the restorative perceptions of patients with anxiety disorders

This study takes healing gardens as the research object and systematically analyzes the influence mechanism of the objective characteristics of their visual and acoustic environments on the subjective perception of anxiety patients with a Hamilton Anxiety Scale (HAMA) score ≥ 14. By combining typical audio-visual material sampling with laboratory evaluation, the study examines the functional relationships between indicators such as visual entropy and soundscape complexity and dimensions including pleasure, aesthetics, arousal, and diversity. This study reveals the typical environmental characteristics of healing gardens, including an average green view index of 28.6%, a building visibility rate of 5.7%, and a sound pressure level of 55.7 dBA. The results show that soundscape complexity and pleasure present an inverted U-shaped relationship (R² = 0.72, p < 0.001), the visual entropy and green view index significantly improve environmental restorativeness, and the anxiety level exerts a negative regulatory effect on audio-visual perception. The research findings provide quantifiable sensory optimization strategies for the design of healing gardens targeting the anxiety disorder population.