Recent Developments in Magnetic Sound Recording
S. J. Begun · Journal of the Society of Motion Picture Engineers · 1937
Although first work in magnetic sound recording occurred probably as far back as 1900, it has been only recently that any considerable interest has been aroused in it. The present paper describes the principles underlying the methods of recording and reproducing by magnetic means, both by longitudinal and perpendicular magnetization, and a steel tape machine used in European broadcasting stations is illustrated. The advantages of the magnetic systems of recording over other systems are outlined.