Photo Credit: Lukasz Szmigiel
Scientific Frontline: Extended "At a Glance" Summary: Psychological Impact of Natural Environments
The Core Concept: A recent North Carolina State University study demonstrates that both the visual stimuli of natural landscapes and the auditory stimuli of birdsong are associated with significant reductions in human psychological stress compared to urban environments.
Key Distinction/Mechanism: To isolate the specific variables of place and sound, researchers placed subjects in either natural or urban settings and utilized noise-canceling headphones to randomize auditory input (birdsong versus traffic noise). This allowed researchers to measure the distinct psychophysiological impact of each sensory input independently.
Major Frameworks/Components:
- Controlled sensory isolation (decoupling visual environmental stimuli from auditory stimuli).
- Subjective psychological evaluation (measuring self-reported stress levels and feelings of cognitive restoration).
- Environmental variable testing (comparing reclaimed nature trails isolated from development against busy urban centers).
Branch of Science: Environmental Psychology, Psychoacoustics, and Public Health.
Future Application: These findings provide an empirical basis for future urban planning, clinical therapeutic interventions, and architectural design to deliberately integrate natural acoustics and green spaces for population-level mental health benefits.
Why It Matters: The data provides quantitative validation for the restorative properties of nature, offering actionable, non-pharmacological strategies for mitigating the chronic stress and mental fatigue associated with increasingly dense urban living environments.
A new study finds the sounds and sights of nature are associated with significant positive effects on mental health compared to loud, urban environments.
The study, by North Carolina State University researchers, compared the experience of hearing different types of sounds in natural and urban environments to determine their effects on the listeners’ emotions.
Study participants were asked to wear noise-cancelling headphones while sitting in either a reclaimed nature trail isolated from development or a busy urban area. The headphones would play either the sounds of traffic or birdsong, with both the location and soundtrack randomized for each participant to allow researchers to isolate the effects of both place and sound.
Participants were then asked to report changes in their levels of stress and how refreshed they felt after the experience, a metric called restorativeness. The effects of natural sights and sounds were immediately apparent, said Nils Peterson, a professor in the NC State College of Natural Resources and lead author of a paper on the study.
“For participants who were in a green space listening to the birds, there were significant effects. Positive emotions went up, negative emotions went down, stress went down, and perceptions of feeling restored went up more than any other combination,” Peterson said. “On the other hand, you had the complete opposite when participants in a gray, urban area listened to the sounds of cars, and more mixed reactions when the sounds and areas were mismatched.”
While the initial implication of these findings is that natural sounds and sights are good for mental health, Peterson said, they also show that urban environments might be made better by incorporating green spaces.
“When you have a really gray space that is going to stress people out and give them negative experiences, if you can change that space so that it has natural sounds, you can ameliorate the downsides of that gray space,” Peterson said. “In our research we have evidence for bird sounds, but there is also a lot of literature supporting the use of water sounds and other things in nature.”
Published in journal: Environmental Conservation
Title: Both restored forest and birdsong promote psychological well-being
Authors: Nils Peterson, Lincoln R. Larson, Trenton Ford, Payton DeMay, Faith Swartz, J. D. Kluttz, Kushagra Meshram, Caitlin McDade, Hannah Desrochers, Aaron Hipp, Jackson Webb, Made Ayu Pratiwi, Eron Foy, Christian Jake Burke
Source/Credit: North Carolina State University | Joey Pitchford
Edited by: Scientific Frontline
Reference Number: psy072126_01