pacts on humans of noises above the acceptable range have been studied extensively. At extreme levels, hearing itself can be impacted. Other problems related to noise include compromised learning, stress, high blood pressure, sleep loss, distraction and lost productivity, and a general reduction in the quality of life and opportunities for tranquility.1 Fewer studies have been done on impacts to wild and domesticated animals, but environmentalists are concerned with impacts such as interference with communication, masking predation, startle and fright.2