DNL65 NEM Part 150 Noise Contour Boundary 2018 Pages from 2016_10_11_SM_6b_supp

Slide 7 from a Sea-Tac Airport presentation comparing the 65 Day Night Level (DNL) noise contours for 1998 (blue outline) and 2018 (red outline), overlaid on a regional map. The caption notes that the 2018 contour is smaller than the 1998 contour due to quieter aircraft technology.

Notes

Slide 7 from a Sea-Tac Airport presentation comparing the 65 Day Night Level (DNL) noise contours for 1998 (blue outline) and 2018 (red outline), overlaid on a regional map. The caption notes that the 2018 contour is smaller than the 1998 contour due to quieter aircraft technology.

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