Eclipse CD3421 Owner's Manual page 38

How to operate the tuner
4 .
MULTIPATH
The reflection characteristics of FM waves cause
another problem called multipath–FM wave signals
reflecting off of buildings, mountains, etc. When the
antenna receives direct and reflected waves at the same
time, distortion of sound in the treble range often
occurs, such as static or a harsh-sounding voices. THIS
IS NOT A TUNER PROBLEM. Only moving to another
area with a clearer signal path can remedy the situation.
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