The AVA Sonic Fence emits the oldest sound in Bird Gard's bird control arsenal. This sound has been around a long time. It is thought that it was originally developed by the Americans to scramble phone and radio messages during the Cold War. In peacetime its role in the U.S.A. has been to repel birds, deer, raccoons, opossums and just about everything else imagineable.
In Australia, various companies who indiscriminately sold them to anyone with a bird problem, regardless of what species the birds were, overused the AVA Sonic Fence. There are certain species on which it does not work.
Bird Gard only sells the AVA Sonic Fence, usually in conjunction with the Electronic Scarecrow sound, to repel a few specific species that we know it works well on.
The basic AVA Sonic Fence unit can be used to run a sonic fence (a series of speakers 30m apart) made up of as many as 8 speakers thus forming a wall of sound 210m long. It can also be used as a part of a multi-blaster, which is a 4 way (360 degree) speaker run by 2 sound generators. This enables the unit to output 2 different sounds in a 360-degree circle. In either sonic fence or multi-blaster form, an 85amp fully charged battery will power the system, non-stop for 2 to 3 weeks. As with all Bird Gard sound generators, the AVA Sonic Fence is fully automatic. It has a light sensor that can be set with the flick of a switch to DAY, NIGHT or 24-HOUR operation. There is no need to physically have to go and turn on in the morning and off at night, it's automatic.
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