On the Spectrum

How the FCC Is About to Cost Small Theaters a Fortuneby Brendan KileyFor theaters around the country, the airwaves are already crowded. Finding open frequencies for their wireless microphones and other devices can be tricky. That requires hopping around in the unused "white space" of America's broadcasting spectrum and hoping a more powerful transmission—from a passing emergency vehicle or big convention—doesn't stomp on their signals, causing loud popping and squelching sounds.But t