Enhancing Psychophysiological Well-Being Through Nature-Based Soundscapes: An Examination of Heart Rate Variability in a Cross-Over Study.

Stress and psychological disorders are substantial public health concerns, necessitating innovative therapeutic strategies. This study investigated the psychophysiological benefits of nature-based soundscapes, drawing on the biophilia hypothesis. Using a randomized, acute cross-over design, 53 healthy participants experienced either a nature-based or a reference soundscape for 10 min, with a 2-min washout period. The nature-based soundscape integrated nature sounds with elements of music to create an immersive nature experience. A calm coffee shop soundscape without discernible speech was selected as a reference to represent a typical urban relaxation environment. Heart rate variability (HRV) was the primary outcome, with exploratory outcomes including heart and respiratory rates, and questionnaires assessing affective well-being, creativity, and belonging. Results showed that the nature-based soundscape significantly improved HRV and reduced heart and respiratory rates, indicating enhanced parasympathetic activity. Participants reported lower feelings of anxiety and depression and increased feelings of comfort, enthusiasm, creativity, and belonging. This study highlights the multifaceted benefits of nature-based soundscapes, suggesting they could serve as easily accessible therapeutic options for promoting immediate recovery and reducing daily stress in healthy individuals.