why are they a redish orange color i mean what does it change or help
The first thing would be a material that does not get caught up in briars and burrs. It should also not inhibit the dogs movement and ability to do it's job. Should be wash and wear, easy to put on and take off. You wouldn't want a material that gets heavy when it's wet. There are many different kinds of coats, vests and protective gear for hunting dogs. You can check Cabela's, Gun Dog Supply, Bass Pro Shop, just to mention a few. You can check these website and see what type of gear they have for hunting dogs. It seems to me, that many of the coats, vests and protective gear are mainly for larger dogs like labs and goldens, but I would think, there should also be something for the smaller dogs, like working spaniels.. edit: I can't see how pockets on a coat will help the dog or the hunter. It's just one more thing for the coat to get caught up in.
Earthquake Truck driving past Neighbour using subwoofer playing just the right album Hum in the heating ducts It could be a resonance - if an external noise hits exactly the resonant frequency of a system, the movement will be out of all proportion to the stimulus (in a system with high Q). The ancient Chinese made an earthquake detector from a big china pot with small beads balanced on the necks. People in the UK have complained about a weird low-frequency noise permeating their house, thought to be a resonance in underground gas pipelines. And a Michael Jackson concert in London with super subwoofers annoyed people miles away that could not hear any actual music.
