The German synthetic popular music combo known as Kraftverk were formed after the members met whilst visiting their grannies in an old persons home. The feedback from so many whistling hearing aids formed the introduction to the hit song, Shes a model ( Ina frauline iz unt model )and led to the band experimenting with hearing aids as instruments. Nowerdays most musicians wear hearingaids whilst performing live in tribute to the work of the German pioneers who are sadly now all completely deaf.