"Why an NPR Labs Digital High-Power Study?"

"Based on initial results of the tests, listeners noticed interference
in the audio, with nearly half indicating they would likely turn off
the radio when power was turned up to –14 dB and –10 dB on closely-
spaced stations with lightly processed formats such as news and
classical music in some portions of a coverage area, according to Dr.
Ellyn Sheffield of NPR Labs and Towson University."

http://www.rwonline.com/article/89178

More reasons to tune out Bob Struble and his HD Radio scam! Gentlemen,
get ready to turn off your radios - LOL!