Ringtone InventorTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video11/21/2013November 21, 2013Whether it's a wine glass or a water glass, every glass has its own unique sound. That inspired economics student Corina Ernst to use them to create crystal clear ringtones for cell phones.https://p.dw.com/p/1ALXmAdvertisement