Definition
Noise is unwanted or excessive sound. It is a well-documented environmental stressor that affects sleep, cognition, cardiovascular health, and mood at exposures common in modern life.
Why it matters
Chronic noise exposure is one of the most under-recognized environmental health risks.
The Science
Environmental noise (traffic, industrial, occupational) elevates cortisol, disrupts sleep architecture, impairs cognitive performance in children, and increases cardiovascular risk. WHO guidelines specify exposure limits with health rationale.
The NSI Perspective
NSI treats noise as physiological input, not lifestyle preference.
Clinical Implications
Ask about noise exposure in sleep, cognitive, and cardiovascular complaints.
Practical Application
If your environment is loud, that is not just annoying. It is a physiological load.
References
- 1.Basner M, Babisch W, Davis A, et al. Auditory and non-auditory effects of noise on health. Lancet. 2014;383(9925):1325–1332.