Overview
- Researchers ran a randomized 2×2 field experiment with 106 campus volunteers who sat in a restored riparian forest or a nearby grey urban site while wearing noise‑cancelling headphones that played either birdsong or traffic, allowing the team to isolate effects of place and sound.
- The restored-forest plus birdsong condition produced the strongest benefits, producing the lowest reported stress and negative feelings and the highest positive feelings and perceived restorativeness compared with other combinations.
- Soundscape and location each had statistically significant effects on every well-being measure in the study, with main effects reported at p < 0.001 and effect sizes ranging from η2 = 0.05 to 0.34.
- Authors recommend urban ecological restoration that restores bird communities and deliberately incorporates natural soundscapes such as birdsong or water sounds to reduce the psychological harms of grey spaces.
- The paper was published July 17, 2026 in Environmental Conservation and was summarized in multiple outlets on July 22, 2026; key limits are that exposures were short, sounds were played through headphones, participants were a campus sample, and long-term or clinical effects remain untested.