Sound reflection. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Sound reflection. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

In the forest, in the mountains, indoors, you can sometimes hear the reflection of sound from some kind of obstacle (forest, mountains, wall).

Experience and observations show that sound reflection is subject to a certain law: the angle of incidence is equal to the angle of reflection.

sound reflection

From cardboard or paper glued in several layers, make a thick-walled tube with a diameter of 60-70 mm, a height of 300 mm. Take the watch, put it on a soft thick bedding, and cover it with a tube on top. The sound will be heard only if the ear is directly above the tube, and if it is higher than the top edge of the tube and to the side, at some distance, you will not hear the sound of the clock.

Now take a piece of cardboard. Position it above the tube, at an angle of about 45° to the axis of the tube. By turning the cardboard, you will achieve (at a certain position of the cardboard to the axis of the tube) a clear audibility of the sound.

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