Purr Detector
This cat collar reacts cat's purr and lights up.
RelInfo: Fauna Communications: The Felid Purr: A bio-mechanical healing mechanism
A current hypothesis suggests the purr indicates contentment, however, cats purr when they are severely injured or frightened.:*snip*:The dominant and fundamental frequency for three species of cats' purrs is exactly 25 Hz, or 50 Hz the best frequencies for bone growth and fracture healing. All of the cats purrs all fall well within the 20 - 50 Hz anabolic range, and extend up to 140 Hz.. All the cats, except the cheetah have a dominant or strong harmonic at 50 Hz.
There are always reasons.
