| 摘要 |
Electrical transducer of the type including at least one element with a sharpened end, such as a tip 5 or ridge, capable of emitting ions when it is brought to sufficiently high electrical potentials, as well as means of modulating the potential applied to the said element 5 by an alternating voltage of acoustic frequency. According to the invention, this transducer is characterised in that it includes grids 7, 8 parallel to one another and to the said element 5 and arranged symmetrically on either side of the latter, in that a high voltage is applied between the grids 7, 8 on the one hand and the said element 5 on the other hand, and in that the said modulating means apply the same alternating voltage of acoustic frequency to the said grids 7, 8, but with opposite phases. Production of headsets, loudspeakers, etc. <IMAGE>
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