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COUTSOUCOS ATHANASE
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Diaphragms For Electromechanical Transducers
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Abstract
Children's sound device, characterized in that it is constituted by a tube of flexible nature endowed on its surface with a succession of grooves and annular projections, forming successive turns, of variable length and diameter, whose tube undergoes a series of turns or curvatures to form some whimsical windings, presenting their ends perfectly free, so that through one of them air can be blown or sucked, to produce sounds of variable modulations according to the speed of air circulation, and depending on the diameter, longitudinal and sinuosity of the tube. (Machine-translation by Google Translate, not legally binding)