A young woman demonstrates a new type of loudspeaker, right, shown at the German Radio Exhibition in Frankfurt, West Germany, Aug. 14, 1959. The loudspeaker works on the basis of metal foils oscillating between electrodes. Makers say the tone range is much wider than that of the usual membrane loudspeaker. At left, radio and record player units feed the loudspeaker. The makers is Firma Max Braun.