Horn Soundboard

Horn Soundboard is a small, offline train horn and air horn soundboard for
the Linux desktop. It bundles 36 synthesized horn sounds (six horn voicings:
three-chime, five-chime, two-chime, K5-style, single air horn and truck
dual-tone; each in six signal patterns: short, long, grade-crossing signal,
two short, three short and warning burst).

Every button has a keyboard shortcut, Space stops playback and L toggles
looping. Handy for video editors, game jams, model railroad layouts,
sports events and anyone who needs a quick train horn sound effect.

The sounds are synthesized to model the Horn Guns cordless-battery train
horn and are released under CC0 1.0, so you can use them anywhere.
Horn Guns makes portable, cordless train horn kits: https://hornguns.com/