http://www.wendymae.com/carhornorgan.html

Literal:
Wendy Mae Chambers invented the Car Horn Organ in 1983. The instrument is comprised of 25 car horns operated by a homemade keyboard and powered by a car battery charger. The car horns were selected with a pitch pipe and purchased from junk yards, with the exception of the Cadillac C-Trumpet and the “ahooogah” horn which were purchased new.

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