Tenor horn and alto horn are different names for the same instrument. It is a brass instrument that plays in the alto range, similar to a horn, but is pitched in the key of Eb. It resembles a baritone or a euphonium in appearance but is smaller in size. The alto horn is commonly used in brass bands and marching bands but is usually replaced by the horn in concert and symphonic ensembles.
YAH, YBH, YEP, YHR
Do you need an additional help?