Dogs' hearing doesn't work as amplification, it works in two ways:
- Dogs can hear more pitches than humans, especially on the high end
- Dogs can hear sounds 'separately', humans can't. An explosion happening simultaneously while a wire is cut is something dogs can hear separately, but human hearing is drowned out by the explosion, and doesn't hear the wire being cut.
So I don't think it's the hearing.
Every dog owner knows that dogs can 'mysteriously' 'sense' things. Animals always react way before an earthquake can be detected by any human devices or senses, animals always instantly know when the owner starts his/her journey back home. The owner always finds an animal waiting at the window or door, and can only wonder how the dog knows.
(This was even tested by the usage of cameras showing what the dog was doing - the INSTANT the owner seriously decided to head home, the dog reacted. You can test this yourself)
Dogs just 'know' things. They know your intentions before you. You can't lie to a dog, you can't 'fake out' a dog. This was also tested, by someone playing poker deciding to stop and leave - the dog owner didn't react at all when the owner was faking 'stopping the poker playing and leaving', but the instant he decided it for real, the dog perked up and walked to the owner.
So think in realistic terms, not just with sight and sound. By the way, dogs also have an incredible sense of smell, which is their main sense. Newborn dogs can smell before they can see before they can hear. Nose, eyes, ears, as Cesar Millan always says.
What is it that makes cell phones detectable by dogs? Well, could it be the same kind of thing - dogs can smell technology, and a soulless machine walking in human skin is sure to make a dog react (for multiple reasons).
It's really a no-brainer, an obvious thing, something so self-explanatory, I never even thought there were people that don't get it. Dogs have wider senses than human beings. Duh!
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