U R correct - perhaps I should go to the Wolo Bad Boy Air Horn, definitely want more sound.
car horns from a parts yard. if they're loud from under a steel hood.......I have dual dodge horns some think they are air horns at first. they do wake up cages.
110 decibels-approximately an automobile horn only 3 ft (1 m) away
@ 3 ft is the standard a horn manufacturer should provide