ISBN-13: 9781494235475 / Angielski / Miękka / 2011 / 42 str.
This report presents acoustical data that were collected by the National Park Service Natural Sounds Program at Sand Creek Massacre National Historic Site between 2009 and 2011. Data were collected to provide park managers with information about the acoustical environment, noise sources, and to provide an estimate of natural ambient sound levels throughout the park.