. ▁ ▁This ▁latter ▁method ▁is ▁used ▁in ▁English ▁style ▁full ▁circle ▁ring ing . ▁ ▁Occ asion ally ▁the ▁cla ppers ▁have ▁le ather ▁p ads ▁( called ▁m uff les ) ▁stra pped ▁around ▁them ▁to ▁qui eten ▁the ▁b ells ▁when ▁practice ▁ring ing ▁to ▁avoid ▁anno ying ▁the ▁neighbourhood . ▁Also ▁at ▁fun er als , ▁half - mu ff les ▁are ▁often ▁used ▁to ▁give ▁a ▁full ▁open ▁sound ▁on ▁one ▁round , ▁and ▁a ▁m uff led ▁sound ▁on ▁the ▁alternate ▁round ▁– ▁a ▁distinct ive , ▁m ourn ful ▁effect . ▁This ▁was ▁done ▁at ▁the ▁Fun eral ▁of ▁D iana , ▁Princess ▁of ▁Wales ▁in ▁ 1 9 9 7 . ▁ ▁A ▁car illon , ▁which ▁is ▁a ▁musical ▁instrument ▁consisting ▁of ▁at ▁least ▁ 2 3 ▁cast ▁bronze ▁cup - sh aped ▁b ells , ▁is ▁tun ed ▁so ▁that ▁the ▁b ells ▁can ▁be ▁played ▁serial ly ▁to ▁produce ▁a ▁mel ody , ▁or ▁sound ed ▁together ▁to ▁play ▁a ▁ch ord . ▁A ▁traditional ▁car illon ▁is ▁played ▁by ▁striking ▁a ▁b aton ▁keyboard ▁with ▁the ▁f ists , ▁and ▁by ▁pressing ▁the ▁keys ▁of ▁a ▁ped al ▁keyboard ▁with ▁the ▁feet . ▁The ▁keys ▁mechan ically ▁activ ate ▁le vers ▁and ▁w ires ▁that ▁connect ▁to ▁metal ▁cla ppers ▁that ▁strike ▁the ▁inside ▁of ▁the ▁b ells , ▁allowing ▁the ▁perform er ▁to ▁vary ▁the ▁intensity ▁of ▁the ▁note ▁according ▁to ▁the ▁force ▁applied ▁to ▁the ▁key . ▁ ▁Church