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A horn is a pointed projection of the skin of various animals. In ruminant artiodactyls, the horns are paired and take various forms depending on the family:
- Tragulidae: No horns.
- Antilocapridae: The horn has a prong.
- Giraffidae: There are bony bumps which look like they ought to have horns on them, but don't.
- Cervidae: Deer have antlers, which are made of bone and shed each year.
- Moschidae: ?
- Bovidae: The horns are made of horn (i.e. keratin) and are cones bent into spiral
shapes.
Some peoples use bovid horns as musical instruments, for
example the shofar. These have evolved into brass instruments in which, unlike the trumpet, the bore
gradually increases in width through most of its length - that is to say, it is conical
rather than cylindrical. These are called horns, though made of metal. See French horn.
In telecommunication, the term horn has the
following meanings:
1. In radio transmission,
an open-ended waveguide, of increasing cross-sectional area, which radiates
directly in a desired direction or feeds a reflector that forms a desired
beam.
Note 1: Horns may have one or more expansion curves, i.e. , longitudinal cross sections, such as elliptical,
conical, hyperbolic, or parabolic curves, and not necessarily the same expansion curve in each (E-plane and H-plane) cross
section.
Note 2: A very wide range of beam patterns may be formed by controlling horn dimensions and shapes, placement of the
reflector, and reflector shape and dimensions.
2. A portion of a waveguide in which the cross section is smoothly increased along the axial direction.
3. In audio systems, a tube, usually having a rectangular transverse cross section and a linearly or exponentially
increasing cross-sectional area, used for radiating or receiving acoustic waves.
Source: from Federal Standard 1037C and from
MIL-STD-188
In phonetics, the term horn is used for a diacritic mark attached to the top right corner of the letters o and
u in the Vietnamese alphabet to give
ơ and ư, unrounded
variants of the vowel represented by the basic letter.
The HTML/Unicode numbers for letters with a horn are:
Places called Horn include:
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