mate, a simple, easy, cheap, well worthwhile mod i highly recommend
is an aftermarket horn to replace the beep beep stock horn..
i went for the plug and play option [no relay etc] of a fiamm low tone
horn from amazon.com all up cost $17 from amazon.com including
delivery to my door.. used existing bracket [bent a little with pliers]
and existing spring washer, bent male connections on horn back
for reach to harness, replugged it and done..
now when they come into my space they react
to "a buick" being there blasting its horn at them..
the option of high plus low tone horns would be even better
if you have access to a workshop and tools etc for brackets
plus install of wiring harness and relays, but others here
have done that and posted great advice and pics..
but for the price and a ten minute plug and play
the fiamm low tone must be a top easy mod