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Ldn contour.

Columbus City Codes § 3384.026
in effect
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3384.026 - Ldn contour. "Ldn contour" means a line linking together a series of points of equal cumulative noise exposure based on the Ldn metric. Such contours are developed based on aircraft flight patterns, number of daily aircraft operations by type of aircraft and time of day, noise characteristics of each aircraft, and typical runway usage patterns. (Ord. 1136-94.)
Source: City of Columbus, City Codes and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/oh/columbus/codes/code_of_ordinances?nodeId=TIT33ZOCO_CH3384AIENOV_3384.026LDCOFetched: 10/27/2026

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3384.026 | Corpus