On 10 Feb 2005 16:16:11 -0800, "diaphone" wrote:

If you absolutely need the loudest electric horn money can buy, the
only option is finding a used Federal Signal "Traffic Blaster". But
don't expect air-horn class loudness, I didn't even need earmuffs when
I tested these horns.

You could buy a rechargable bike horn ($15) that is easily as loud as
the "sports fan horns". It compresses on a standard Schrader valve on
a gas station air pump to about 80 PSI and lasts longer than I've ever
needed it to. Quite compact, too, and if you use it on a bike, it will
clear an intersection or break thru a car window and past some
mega-bass hip hop to attract the attention of some addled driver.

R.

Yes, these rechargeable horns are very cool. Some are made to fit a
standard 16 oz soda bottle (to fit in the water bottle cage). You can
increase toot capacity by using a 1-liter bottle instead, but don't go
to a larger diameter bottle like a 2 or 3 liter as the burst pressure
drops with diameter but total energy stored goes way up. A 2 liter will
burst at around 160 to 180 psi with devastating force (and a report
like a car backfiring).

-Adam