Magnetic Recording in Motion Picture Techniques
John G. Frayne, Halley Wolfe · Journal of the Society of Motion Picture Engineers · 1949
Development of magnetic recording at the Bell Telephone Laboratories is described with the application of such facilities to Western Electric recording and reproducing systems. A method of driving 35-mm magnetic film with a flutter content not greater than 0.1 per cent is described, as is a multigap erasing head.