We’ve been getting some comments and calls this week about Morning Edition sounding distorted at times, especially for Lumberton listeners. Our equipment is working correctly. What many are hearing is a phenomenon known as “tropospheric ducting,” which can play havoc with FM signals. Graduate Fellow Jason Hess discovered a great online resources for “ducting” forecasts. Yesterday's map for Southeastern North Carolina, for example, showed us in a bright orange area, meaning “very strong” to “intense”.