NU6T is right, most birds DO get used to the sound and thus ignore it.
Another thing to remember is that many many communities either heavily regulate
or totally forbid "audible scarecrows" such as air cannons, sirens, air horns,
My town absolutely forbids them under an ordinance. And we are an agricultural
community. (So much for farming !!!)
At least they look the other way on ham towers!
73, Mike KM1R
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