The company used computers to analyze 350 barks and found dogs of all breeds and sizes barked the same alarm when they sensed a threat.
The dog's superior senses of hearing and smelling, combined with its alertness and basic territorial instincts, allow it to identify potential intruders and warn of their presence, even in severe weather and vision conditions. When threatened, the dog produces instinctive alarm barks in order to warn other pack members of imminent danger.
The dog's "alarm barks" (as opposed to play barks, saying "hello" or barking at a cat) activate the DogGuard sensors, which then turn the alarm system on.
Bio-Sense Technologies spent two years capturing the sound waves of woofs and arfs, encoding them to be read by a digital signal processor.
Called the DBS (Dog Bio Security), it is based on Bio-Sense Technologies' algorithms. To continuously monitor the status of the watchdogs (the dogs need two to three weeks to adapt to their new environment -- they must get to know their territory) the system uses sensors and transmitters located in the vicinity of the dog, or alternatively, on the dog itself. The data obtained are filtered and processed, using these specially developed proprietary algorithms that interpret the responses of each dog and determine the psychological state of the dog. The system then informs the user, indicating one of the pre-determined active alert levels:

• * No-Alert - The watchdog is responding to routine events
• * Medium-Alert - There is suspicious activity in the vicinity
• * High-Alert - An intrusion has occurred into the dog's territory

The sensor picks up the signals, analyses them, and decides on a security alert. According the manufacturer, the system is completely dog-friendly, and has been approved by all animal welfare organizations.