We toured an Amazon fulfillment center. Here’s what we saw.

It’s nearly impossible to hear anything that is not inches away from your face inside the Amazon.com Inc. fulfillment center in Baltimore. Imagine trying to detect a single rain drop hitting a tin roof during a thunderstorm.

The clamor of conveyor rollers, elevators, humming robots and scanners echoing inside 1.2 million square feet drowns your ears.

Seeing it is even more overwhelming…