Visible speech-rotary field coordinate-conversion analyser

A process is discussed, in which a rotaryfield is generated by the speech frequency spectrum. The rotary field deflects the electron current of an oscilloscope, so that the typical polar coordinate pictures appear on the screen. These are substantially independent of fundamental frequency. Successive pictures can be produced by conversion of these polar coordinate pictures. In order to accomplish this one employs a dilsc with a speed of υ/2. Selected parts of the screen picture can be traced through regulation of the intensity. The cartesian pictures are thus also simplified, so that a "reading" of speech analysis, this process may also be employed to produce polar and cartesian pictures of brain waves, etc. Moreover, polar coordinate maps can be converted into cartesian coordinates and vice versa.