, ▁and ▁b ery l li um . ▁A ▁ ▁paper ▁w oo fer ▁with ▁a ▁peak - to - pe ak ▁exc urs ion ▁of ▁ 0 . 5 ▁inches ▁at ▁ 6 0   Hz ▁under go es ▁a ▁maximum ▁acceleration ▁of ▁ 9 2 ▁" g " s . ▁ ▁P aper - based ▁con es ▁account ▁for ▁approximately ▁ 8 5 % ▁of ▁the ▁con es ▁sold ▁world wide . ▁The ▁ability ▁of ▁paper ▁( cell ul ose ) ▁to ▁be ▁easily ▁modified ▁by ▁chemical ▁or ▁mechanical ▁means ▁gives ▁it ▁a ▁practical ▁processing ▁advantage ▁not ▁found ▁in ▁other ▁common ▁cone ▁materials . ▁ ▁The ▁purpose ▁of ▁the ▁cone / s urr ound ▁assembly ▁is ▁to ▁accur ately ▁reproduce ▁the ▁voice ▁co il ▁signal ▁wave form . ▁ ▁In ac cur ate ▁reprodu ction ▁of ▁the ▁voice ▁co il ▁signal ▁results ▁in ▁ac oust ical ▁dist ort ion . ▁ ▁The ▁ideal ▁for ▁a ▁cone / s urr ound ▁assembly ▁is ▁an ▁extended ▁range ▁of ▁linear ity ▁or ▁" p ist onic " ▁motion ▁character ized ▁by ▁i ) ▁minimal ▁ac oust ical ▁break up ▁of ▁the ▁cone ▁material , ▁ii ) ▁minimal ▁standing ▁wave ▁patterns ▁in ▁the ▁cone , ▁and ▁i ii ) ▁linear ity ▁of ▁the ▁surr ounds ▁force - def lection ▁curve . ▁ ▁The ▁cone ▁st iff ness / d amp ing ▁plus ▁the ▁surr ound ' s ▁linear ity / d amp ing ▁play ▁a ▁cru cial ▁role ▁in ▁accuracy ▁of ▁the ▁reprodu ced ▁voice