10/01/2022
Science Experiment - 12
Unit - Sound
We learnt to about how string instruments create sound by vibrations. On striking the cords or strings they make vibrations and these instruments are tuned to make a range of sounds. Also, how guitars have a sound box/resonator that amplifies sound.
Objective - how resonance increases sound intensity.
Materials needed -
1 empty box
3 elastic bands of different thickness
Sticks (we used pencils)
Method - Strike the elastic bands in open air and then put them on the tin box as shown in the video and strike. Add two sticks on each end (as bridge in a guitar), strike the bands again and note the sounds produced.
Explanation - Initially when the band is struck in open air the vibrating air gets lost producing very low sound. Then it produces a louder sound because the tin box act as an amplifier, the vibrating air inside the box strike with the wall of the box and creates higher sound intensity.
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Sammy and his Mommy ❤️❤️❤️