▁harm on ics . ▁This ▁process ▁was ▁made ▁possible ▁histor ically ▁by ▁the ▁use ▁of ▁tun ing ▁for ks ▁to ▁find ▁sympath etic ▁reson ance ▁on ▁specific ▁parts ▁of ▁a ▁bell ▁for ▁the ▁harm onic ▁being ▁tun ed , ▁but ▁today ▁electronic ▁stro be ▁tun ers ▁are ▁normally ▁used . ▁To ▁t une ▁the ▁strike ▁note , ▁the ▁nom inal ▁or ▁the ▁strike ▁note ▁are ▁tun ed ; ▁the ▁effect ▁is ▁usually ▁the ▁same ▁because ▁the ▁nom inal ▁is ▁one ▁of ▁the ▁main ▁partial s ▁that ▁determ ines ▁the ▁tone ▁of ▁the ▁strike ▁note . ▁ ▁The ▁thick ness ▁of ▁a ▁church ▁bell ▁at ▁its ▁thick est ▁part , ▁called ▁the ▁" sound ▁bow ", ▁is ▁usually ▁one ▁th ir teenth ▁its ▁diameter . ▁If ▁the ▁bell ▁is ▁mounted ▁as ▁cast , ▁it ▁is ▁called ▁a ▁" ma iden ▁bell ". ▁ ▁Major ▁third ▁bell ▁The ▁traditional ▁harm on ically ▁tun ed ▁bell ▁has ▁a ▁minor ▁third ▁as ▁a ▁main ▁harm onic . ▁On ▁the ▁theory ▁that ▁western ▁music ▁in ▁major ▁keys ▁may ▁sound ▁better ▁on ▁b ells ▁with ▁a ▁major ▁third ▁as ▁a ▁harm onic , ▁production ▁of ▁b ells ▁with ▁major ▁third s ▁was ▁attempted ▁in ▁the ▁ 1 9 8 0 s . ▁Scient ists ▁at ▁the ▁Techn ical ▁University ▁in ▁E ind h oven , ▁using ▁computer ▁mod elling , ▁produced ▁bell ▁profiles ▁which ▁were ▁cast ▁by ▁the ▁E ij sb outs ▁Bell found ry ▁in ▁the ▁Netherlands . ▁They ▁were ▁described ▁as ▁res emb ling ▁old ▁Co ke