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Show HOW NOISE BREAKS WINDOW Sound Waves in the Air Have Only to Be Powerful Enough to Get Results. Noise is an Irregular wave In the air which is a real thing, and has w eight and power, remember. A wave of all' may break a window exactly" as the wave in the sea will break a breakwater, break-water, though, as the name tells us, the breakwater will break the wave, as long as that wave is not too strong- If you will think a minute you will see that every time a noise gets through a shut window it shakes tho window, ir thi roise Is coming in ,fn?.ITl, tho -etreg-fc nlr -outside Is It until they slrfftC the window, ana Bhake It; then tlfe window shakes the air inside tho room in exactly the same way as the air outside shook it, only perhaps not quite so strongly. And so the noise reaches you, just as if you had heard It outside, only not quite so loud. Well, plainly, the noise has only to bo loud enough that is to say, the waves in the air have only to be big enough to shake the window more than It an stand, and then It breaks. |
