Noun
vibraharp (plural vibraharps)
the vibraphone
However, when Deagan began marketing Schluter's instrument in 1928, they called it the vibraharp. Source: Internet
The vibraphone was (and is still) sometimes referred to as the "vibraharp," though it has no strings and its sound is produced by striking metal bars. Source: Internet
The name confusion continues, even to the present, but over time vibraphone became significantly more popular than vibraharp. Source: Internet