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These devices are usually combined with a motion sensor which is triggered by movement within the sensors range. This causes the device to emit high frequency noise which is uncomfortable to the cats, and inaudible to most humans (although they can still experience unpleasant subjective effects and, potentially, shifts in the hearing threshold ...
Nevertheless, during the 1980s, video surveillance began to spread across the country specifically targeting public areas. [14] It was seen as a cheaper way to deter crime compared to increasing the size of the police departments. [26] Some businesses as well, especially those that were prone to theft, began to use video surveillance. [26]
These cameras do not require a video capture card because they work using a digital signal which can be saved directly to a computer. The signal is compressed 5:1, but DVD quality can be achieved with more compression (MPEG-2 is standard for DVD-video, and has a higher compression ratio than 5:1, with a slightly lower video quality than 5:1 at best, and is adjustable for the amount of space to ...
Automatic Cat Feeder With Camera. For the ultimate way to monitor your cat's eating habits, try this camera-enabled automatic cat feeder. A built-in HD camera boasts a 120-degree, wide-angle view.
An animal repellent consists of any object or method made with the intention of keeping animals away from personal items as well as food, plants or yourself. Plants and other living organisms naturally possess a special ability to emit chemicals known as semiochemicals as a way to defend themselves from predators.
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