There was no brass band or wild applause when the doors to Cummins’ Acoustical Testing Center (ATC) first swung open to the public last fall. Instead, visitors were greeted by silence. Silence is precisely the point of the Company’s new sound-testing facility in Fridley, Minn., built next to the Cummins Power Generation (CPG) plant. With its curved roof and sound-absorbing acoustical wedges lining the walls and ceiling, the distinctive-looking center is the largest facility of its kind in the industry.