More information can be found at:
Buxton, Racel T., et al. “A Synthesis of Health Benefits of Natural Sounds and Their … – Pnas.” PNAS, 22 Mar. 2021, https://www.pnas.org/doi/10.1073/pnas.2013097118.
Luo, Jiutong, et al. “The Effects of Using a Nature-Sound Mobile Application on Psychological Well-Being and Cognitive Performance among University Students.” Frontiers, 28 Oct. 2021, https://www.frontiersin.org/articles/10.3389/fpsyg.2021.699908/full.
MacMillan, Amanda. “Why Nature Sounds Are Great for Relaxation.” Edited by Kimberly Brown, Health, 13 June 2022, https://www.health.com/condition/stress/why-nature-sounds-are-relaxing.