i'm not speaking english properly and will not edit the article therefore but want to add two points refering to the section origins history and usage if some metals form an alloy this alloy has specifics of its own not a combination of the different metals it is made up of i'm pretty sure the following declaration is nonsense from a sientific point of view emphasis mine the overtones are a result of using an alloy consisting of multiple metals each producing its own overtone new bowls can also produce multiple harmonic overtones if they are high quality bronze but many are made from a simpler alloy and produce only a principal tone and one harmonic overtone i have heard a cast iron bowl with a very impressive rich tone and that is a very simple alloy additionally the term aging process in the following paragraph and the last sentence of the section antique singing bowls needs a sientific explanation the aging process greatly improves the tone and centuries old antiques produce an incredibly rich and beautiful sound i'm pretty sure the beautifully sounding antique singing bowls were sounding equally rich at their producing time you don't find lousy antique bowls today because as soon as their metal worth exceeded their beauty or practical worth as a container at any time in the past they were molten down ulan