Hills, buildings, and vegetation absorb and reflect the signal. That is why hilltops are an ideal spot for reception and why many people in river and creek valleys have difficulty with their reception. Areas like Crabtree Valley in Raleigh have problems receiving WUNC because of low elevation and because the Blue Ridge reduces the signal strength. Reflections of the signal from terrain or man-made objects may also cause reception difficulties. To overcome this the antenna can be moved as little as three feet.
Building materials absorb and weaken the signals.
The best reception in office buildings is on an outside wall facing the radio station or next to a window. Your local electronics retailer or TV repair shop can supply a variety of antennas and accessories for improved reception. Locate the antenna in the attic or on the rooftop if possible. For best results, use the low loss coaxial lead in wire. For locations greater than 30 miles or locations with terrain that is partially blocking the signal, the use of a directional antenna is recommended.