▁is ▁actually ▁trying ▁to ▁do . ▁ ▁But ▁they ▁also ▁tend ▁to ▁be ▁highly ▁correl ated ▁with ▁the ▁total ▁leak age , ▁which ▁is ▁quant ifiable . ▁ ▁It ▁is ▁usually ▁expressed ▁as ▁an ▁equivalent ▁band width , ▁B . ▁ ▁It ▁can ▁be ▁thought ▁of ▁as ▁red ist rib uting ▁the ▁D T FT ▁into ▁a ▁rect angular ▁shape ▁with ▁height ▁equal ▁to ▁the ▁spectral ▁maximum ▁and ▁width ▁B . ▁ ▁The ▁more ▁the ▁leak age , ▁the ▁greater ▁the ▁band width . ▁ ▁It ▁is ▁sometimes ▁called ▁noise ▁equivalent ▁band width ▁or ▁equivalent ▁noise ▁band width , ▁because ▁it ▁is ▁proportional ▁to ▁the ▁average ▁power ▁that ▁will ▁be ▁registered ▁by ▁each ▁D FT ▁bin ▁when ▁the ▁input ▁signal ▁contains ▁a ▁random ▁noise ▁component ▁( or ▁is ▁just ▁random ▁noise ). ▁ ▁A ▁graph ▁of ▁the ▁power ▁spectrum , ▁aver aged ▁over ▁time , ▁typically ▁reve als ▁a ▁flat ▁noise ▁floor , ▁caused ▁by ▁this ▁effect . ▁ ▁The ▁height ▁of ▁the ▁noise ▁floor ▁is ▁proportional ▁to ▁B . ▁ ▁So ▁two ▁different ▁window ▁functions ▁can ▁produce ▁different ▁noise ▁flo ors . ▁ ▁Process ing ▁gain ▁and ▁losses ▁ ▁In ▁signal ▁processing , ▁operations ▁are ▁chosen ▁to ▁improve ▁some ▁aspect ▁of ▁quality ▁of ▁a ▁signal ▁by ▁explo iting ▁the ▁differences ▁between ▁the ▁signal ▁and ▁the ▁cor rupt ing ▁influ ences . ▁ ▁When ▁the ▁signal ▁is ▁a ▁sin us oid ▁cor rupted ▁by ▁add itive ▁random ▁noise , ▁spectral ▁analysis ▁dist ributes ▁the ▁signal ▁and ▁noise ▁components ▁differently , ▁often ▁making ▁it