Predictive sound map of the US by Kurt M. Fristrup

The National Park Service created models of sound level and night sky conditions for the coterminous U. S. to assess resource conditions in national parks and adjacent landscapes. These models generalize measurements taken from hundreds of sites spanning the range of geographic and ecological conditions found in park units. These data show that most people live in environments where night skies and soundsapes are profoundly degraded, and that noise and light pollution issues span much of the continent.