Abstract
FROM practical experience I am able neither to confirm nor to contradict Mr. Pendred's interesting observations on the difficulty of practising, simultaneous deceptions on the senses of seeing and hearing. It is quite possible, of course—perhaps likely—that it is easier to produce one such effect than both at once; but I can see no reason, a priori, for expecting the double deception to be impossible. It must be remembered that both moving pictures and ordinary gramophones have been improved greatly during the years since Mr. Pendred's experiences, and that, could perfect synchronisation be guaranteed, the results he describes might now be modified considerably. Mr. Pendred would, I think, admit that if both pictures and sounds could be sufficiently improved, the remaining imperfections, even though, possibly, additive, might yet be so small that the deceptions aimed at would both be effective.
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RANKINE, A. Speaking Films. Nature 108, 339 (1921). https://doi.org/10.1038/108339a0
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DOI: https://doi.org/10.1038/108339a0
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