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Flashing Lights Warn Library Visitors to Be Quiet

From the Chronicle of Higher Ed
 

To tamp down the noise level in their libraries, some colleges are considering installing a warning system that looks like a traffic signal. Called the Deluxe Yacker Tracker, the device flashes a yellow light to indicate when the noise exceeds a certain level. When it exceeds the level by at least 15 decibels, the red light illuminates and a siren can go off, too.

What ever happened to just approaching students and telling them to keep it down?---Andrea L. Foster

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