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July 5, 2026International Journal of Urban Sustainable DevelopmentOpen Access

Mapping Nairobi’s environmental noise using a custom crowdsourcing smartphone app for evidence-based urban noise regulation and policy

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Authors

DSDavid N. Siriba

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Overview

Randomized trial maps environmental noise in Nairobi using a smartphone app, suggesting improved urban policy decisions.

Key Points

  • This study aims to determine if citizen-science smartphone measurements can effectively map road-traffic noise in Nairobi for policy-making.
  • Volunteers collected road-traffic noise data using the Urban Ear app in various sub-counties.
  • Analysis focused on identifying noise hotspots and comparing averages to WHO thresholds.
  • Significant noise hotspots were found, with sub-county averages exceeding WHO thresholds by 10–35 dB(A).
  • Citizen-science mapping identified priority corridors for potential policy decisions.

Cite This Study

David N. Siriba (2026) studied this question.

synapsesocial.com/papers/6a49f411f5d1d45b287ffba8https://doi.org/10.1080/19463138.2026.2669417
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