Noise-free interval is the period of elapsed time between human-caused noise intrusions. In wilderness areas within the United States the noise-free interval rarely exceeds several minutes during daylight hours. The NFI at One Square Inch will be 24 hours and the NFI will gradually shrink with increased distance from this point. The size of the area affected and the rate of change in the NFI is unknown at this time.
« Older Wireless bluetooth headset.... | mooncruise... Newer »
This thread has been archived and is closed to new comments
Buy a Shirt