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How is the noise level measured?

April 26, 2017level measured noise

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How is the noise level measured?

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The City of Calgary specifies a Design Noise Level (DNL) that may be received at dwellings. The DNL is defined as the daily unit of noise that condenses 24 hours worth of sound energy into a single number scaled to correlate closely with human hearing. Noise levels are measured in decibels (dBA).