Robert Wood pipe

In 1929 in one of the London theaters there was a rehearsal of the play, the time of action in which, in the course of the play, was to be transferred from our days to 1763. The director wanted very much that during the darkening on stage the audience prepared for almost a one and a half-century jump in action, but how to do it, the director could not think of.

The famous physicist Robert Wood, who was spending his vacation in London at the time, advised using infrasound

The famous physicist Robert Wood, who was spending his vacation in London at the time, advised using infrasound. To do this, Wood built a pipe like organ. By its size, it was longer and thicker than the largest bass pipe of the church organ. A very low note, generated by the tube, is almost inaudible, but the vibrating eardrum, according to Wood, was supposed to produce a sense of "mystery" and inform viewers of the necessary mood.

The pipe was tested at rehearsals. The gathering was not dedicated to Wood's "secret" pipe, and during the blackout, an unexpected effect followed, like the one that precedes the earthquake: the windows rattled, the crystal chandeliers rang. The whole old building began to tremble, and a wave of horror swept through the hall. Scared even residents of the neighboring houses with the theater.

The director of the play, despite the brilliant effect, ordered that "such-and-so" organ pipe Wood immediately threw out.

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