NEW MODEL! - This updated model features lighter construction, an attachment point for a lanyard, and for user comfort can be coupled with ear-buds from common ear-bud (in-ear) headphones! Note that Shapeways does not ship the buds, so you need to either scavenge them from an old set of headphones or buy them online (search Google e.g. "replacement earbuds"). I've used a basic anthropometric human head model in the design so that the horn entrance is about at eye level, when the horn is placed on-ear. Beta-tested by my Mom who loves it! Seems to survive high temperatures too (tested in Sauna).