Reader Larry sent me this link about the science behind vibrating razors: Mad Physics. According to the article its a combination of physics (the vibrations) and biology (the arrector pili, which is responsible for raising hairs on the skin, like “goose bumps”). It sounds plausible I suppose, but I have not been able to find other references to the connection. In fact, I found a number of references (here’s the NY Times reference which is an interesting article in itself) to a lawsuit that forced Gillette to drop its claim that the Mach3 Power “lifted the hair for a better shave.” The most common explaination I’ve read basically says the vibrations really just numb the tissue under the skin making it “feel” like you’re getting a more comfortable shave. Any scientists out there reading me?
By the way, the Gillette “power” razors are not the first to use vibrating technology. Check out the Stahly Live Blade.