▁a ▁ratio ▁of ▁signal ▁power ▁to ▁some ▁noise ▁power , ▁it ▁can ▁be ▁calculated ▁as : ▁ ▁The ▁signal ▁power ▁is : ▁▁ ▁The ▁quant ization ▁noise ▁power ▁can ▁be ▁expressed ▁as : ▁ ▁G iving : ▁ ▁When ▁the ▁S Q NR ▁is ▁desired ▁in ▁terms ▁of ▁de ci b els ▁( d B ), ▁a ▁useful ▁approximation ▁to ▁S Q NR ▁is : ▁ ▁where ▁ ▁is ▁the ▁number ▁of ▁bits ▁in ▁a ▁quant ized ▁sample , ▁and ▁ ▁is ▁the ▁signal ▁power ▁calculated ▁above . ▁Note ▁that ▁for ▁each ▁bit ▁added ▁to ▁a ▁sample , ▁the ▁S Q NR ▁goes ▁up ▁by ▁approximately ▁ 6 d B ▁( ). ▁ ▁References ▁▁ ▁B . P . L ath i ▁, ▁Modern ▁Digital ▁and ▁Anal og ▁Communic ation ▁Systems ▁( 3 rd ▁edition ), ▁Oxford ▁University ▁Press , ▁ 1 9 9 8 ▁ ▁External ▁links ▁▁ ▁Sign al ▁to ▁quant ization ▁noise ▁in ▁quant ized ▁sin us oid al ▁- ▁Analysis ▁of ▁quant ization ▁error ▁on ▁a ▁s ine ▁wave ▁ ▁Category : Digital ▁audio ▁Category : Engine ering ▁r ati os ▁Category : No ise ▁( elect ron ics ) <0x0A> </s> ▁S ale em ▁Abd ul ra uf ▁is ▁an ▁American ▁neu ros ur geon . ▁He ▁is ▁a ▁phys ician ▁special izing ▁in ▁neu ros urg ery ▁in ▁St . ▁Louis , ▁Missouri , ▁who ▁has ▁helped ▁develop ▁high - flow ▁brain ▁by pass ▁surg ery , ▁a ▁procedure ▁for ▁tre ating ▁int rac ran ial ▁an