The decibel originates from methods acclimated to quantify reductions in audio levels in blast circuits. These losses were originally abstinent in units of Miles of Accepted Cable (MSC), area 1 MSC corresponded to the accident of ability over a 1 mile (approximately 1.6 km) breadth of accepted blast cable at a abundance of 5000 radians per additional (795.8 Hz), and almost akin the aboriginal abrasion apparent to the boilerplate listener. Accepted blast cable was authentic as "a cable accepting analogously broadcast attrition of 88 ohms per bend mile and analogously broadcast blow capacitance of .054 microfarad per mile" (approximately 19 gauge).4