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      08-03-2015, 04:22 PM   #10
Billfitz
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Most of these claim to operate in the region above the range of human hearing. That's fine if you're trying to repel dogs, but the frequency range of hearing for deer is similar to that of human beings, so if you can't hear it neither will deer. Moose are worse. They have no natural enemies, so they don't fear anything and will ignore any noises and go wherever they please.
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