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Updated: June 9, 2025
Everywhere in Europe also this fact was corroborated, and in some places even a seventh oscillation was recorded. The Greenwich record shows that the air-waves took about thirty-six hours to travel from pole to pole, thus proving that they travelled at about the rate of ordinary sound-waves, which, roughly speaking, travel at the rate of between six and seven hundred miles an hour.
The sense of direction by the ear is known to be due in part to the action of the auricle, or projecting part of the ear. This collects the air-waves, and so adds to the intensity of the sounds, especially those coming from in front, and thus assists in the estimation of direction. Thus, sounds really travelling from a point in front of the head will appear to come from behind it.
Everywhere in Europe also this fact was corroborated, and in some places even a seventh oscillation was recorded. The Greenwich record shows that the air-waves took about thirty-six hours to travel from pole to pole, thus proving that they travelled at about the rate of ordinary sound-waves, which, roughly speaking, travel at the rate of between six and seven hundred miles an hour.
The sound waves in the air fairly shake the windows; and, sometimes, when the windows are closed, so that the air-waves cannot pass readily, the windows are shattered by the shock. Fainter sounds act less violently, yet similarly. Every time you speak, your voice sets everything around you vibrating in unison, though ever so faintly.
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