NEM stands for which term in this context?

• A. Noise Exposure Map
• B. New Environmental Map
• C. Noise Elimination Model
• D. Noise Exposure Measurement

Answer: (A)

NEM means Noise Exposure Map. In environmental noise assessment, a Noise Exposure Map is a geographic representation that shows how loud different locations are, usually expressed in decibels and displayed with color shading or contour lines. It combines data from various noise sources—like road traffic, rail, aircraft, and industry—with propagation models to estimate exposure across an area. This helps planners identify where noise is highest, evaluate mitigation options, and monitor changes over time. The other terms aren’t standard: a “New Environmental Map” isn’t a recognized term here, a “Noise Elimination Model” isn’t used for exposure mapping, and “Noise Exposure Measurement” refers more to specific data points than a comprehensive map.