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Planning commission continues noise-ordinance hearing after questions about enforcement, measurement
Summary
The Sierra Madre Planning Commission continued its public hearing on proposed municipal code amendments to the noise ordinance after commissioners, police and acoustical consultants raised questions about how the proposed decibel standards, C-weighted measurements and a 10‑minute enforcement measurement would be implemented.
Sierra Madre City Planning Commission on May 15 continued a public hearing on a proposed municipal code text amendment (MCTA 25‑01) that would set numeric noise limits, add C‑weighted measurements for low‑frequency noise, shorten measurement duration to 10 minutes and remove a separate vibration standard.
The hearing matters because the ordinance would replace a largely qualitative noise code with measurable decibel thresholds and enforcement procedures that the police department says could require on‑site measurements before a citation is issued.
System Planner Huang, the staff presenter, summarized the key technical elements: "the allowable equivalent continuous sound sound levels, measured in 10 minutes is 60 dBA in the daytime and 50 dBA in the evening time with maximum noise levels of 80 and 70 dBA," and said consultants from Rincon recommended adding C‑weighted (dBC) measurements to capture low‑frequency bass. Huang also said staff and Rincon recommended deleting the separate vibration section because of…
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