dB 15 : Decibel. A unit for expressing the relative intensity of sounds on a scale from 0 (average least perceptible) to 130 (average pain level). Unit used to express sound power levels. The higher the number, the greater the sound energy
Grainger, Inc. (Maintenance, Repair and Operating MRO), Glossary of Safety Terms, IL, USA 2012. www.grainger.com/images/GlossaryofSafetyTermsPDF.p df, (IndS/Maint, Repr and Opr - Amer) {79}