Description: in order to being able to trace the fabrication of an item, an alphanumeric sequence is mapped to the device; Name: number of fabrication
Description: alphanumeric character sequence assigned to a fabricated product, which allows the date, time and circumstances of fabrication to be traced; Name: fabrication number
Description: integral of the sound power, p, over a stated time interval of duration t (starting at t1 and ending at t2); Name: sound energy