Blog · Longevity by Design

Urban Noise and Health: Designing Quiet Zones

Published: November 2, 2026 · Updated: November 2, 2026

By Sabina Malikova, Sabina Malikova Design Office.

We have learned to treat city noise as background, an unavoidable cost of urban life. But the body never treats it as background. Long before you consciously notice a passing truck or a distant siren, your nervous system has already registered it as a potential threat. This is the uncomfortable truth at the centre of my work on the acoustic city: urban noise is not merely unpleasant, it is a measurable input to your health, and designing quiet back into

dense neighbourhoods is one of the most overlooked longevity interventions we have.What the science saysSound is processed as information about safety. When noise is persistent, the brain keeps the stress machinery switched on: the hypothalamic-pituitary-adrenal (HPA) axis and the sympathetic nervous system stay elevated, releasing stress hormones and keeping heart rate and blood pressure raised. Research on the mechanisms linking noise, stress and the cardiovascular system (PMC6878772) describes this pathway in detail. Over months and years, that low-grade activation appears

to leave a mark: studies of traffic noise and inflammation (PMC2898857) associate chronic exposure with higher levels of C-reactive protein (CRP), a marker of systemic inflammation that tracks with cardiovascular risk. Work informing the WHO environmental noise guidelines (PMC5877064) points the same way, linking sustained noise to poorer cardiovascular and metabolic outcomes. Research shows that the danger is not any single loud moment, but the quiet, cumulative pressure of never being fully at rest.Noise is a whole-body signalBecause this response

is automatic, it continues even while you sleep, which is why night-time noise is so costly. To protect health, the WHO framework recommends keeping outdoor night-time levels below 45 dB(A) and daytime levels below 55 dB(A), the thresholds I design toward. The goal is not sterile silence, which can feel unsettling in its own way, but the absence of the…

Related reading

• Longevity design consultation service
• Documented outcomes (press release)
• Completed projects across four countries
• WHO 2016 — preventing disease through healthy environments

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