From about 1888 to 1925, a horn was used to concentrate sound waves in the process of recording onto Edison cylinders, and another horn was used to amplify the recordings during playback.
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Subsequent to Keele's work and using his principles, Clifford A. Henricksen and Mark S. Ureda of Altec designed a strikingly different hybrid horn displaying constant directivity traits, the horizontal diffraction or "Mantaray" horn.
Cape Horn | horn | Trevor Horn | Horn-Bad Meinberg | Van Horn, Texas | loudspeaker | Keith Van Horn | Horn | Gyula Horn | Big Horn Mountains | Walther Hermann Richard Horn | Loudspeaker | Horn Island | Dara Horn | horn section | Gustav Horn, Count of Pori | Golden Horn | The Horn and Hardart Children's Hour | The Case of the Mukkinese Battle Horn | Robert T. Van Horn | Jeremy Horn | Isis (horn-rock band) | Horn Island, Queensland | Horn (instrument) | Holmdel Horn Antenna | Gustav Horn | Ellen Horn | Camilla Horn | Bruce Horn | Welby Van Horn |