SignalCalc QC is a dynamic signal analysis system that measures and evaluates product quality based on acoustic and/or vibration characteristics. Quality control has become the watch-word of the decade. Manufacturers are striving to consistently produce products that match design specifications. The drive for manufacturing consistency is motivated by the need to: reduce manufacturing scrap and thereby reduce manufacturing costs, increase the reliability of products in the field, reduce or eliminate the number of products with noise or vibration problems reaching the consumer, and achieve national / international quality certifications to maintain market competitiveness