{"id":57218,"date":"2025-12-13T04:50:28","date_gmt":"2025-12-12T19:50:28","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=57218"},"modified":"2025-12-13T04:52:20","modified_gmt":"2025-12-12T19:52:20","slug":"%e8%a6%8b%e3%81%88%e3%81%aa%e3%81%84%e3%80%8c%e9%9f%b3%e3%80%8d%e3%81%ae%e5%bd%a2%e3%81%8c%e8%a6%8b%e3%81%88%e3%81%a6%e3%81%8f%e3%82%8b%ef%bc%81%e3%82%bf%e3%83%96%e3%83%ac%e3%83%83%e3%83%88%e3%81%a8","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=57218&lang=en","title":{"rendered":"See the Hidden Shapes of Sound! Exploring Resonance with a Tablet and Water (Air Column Resonance Experiment)"},"content":{"rendered":"

Hello, this is Ken Kuwako, your Science Trainer. Where every day is an experiment.<\/strong><\/span><\/p>\n

“Sound” is invisible to the naked eye. But wouldn’t you feel a spark of excitement if you could capture those invisible waves perfectly using just math and experiments? Today, I\u2019m introducing a lesson on “Air Column Resonance.” We\u2019ll combine modern tablet devices<\/strong> with good old-fashioned water and pipes<\/strong> to unlock the secrets of sound speed and wave shapes. Try to picture the invisible “vibrations of the air” in your mind as you read along.<\/p>\n

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Visualizing “Sound” with Tablets \u00d7 Analog Experiments<\/h3>\n

At the Narika Science Academy, we actively introduce experiments utilizing tablets<\/strong> within our science curriculum. Yesterday, we conducted the “Air Column Resonance” experiment using an acrylic pipe and a tablet. The mechanism behind this experiment is simple, yet the science runs deep. We use an oscillator app on the tablet to continuously project a sound at a precise frequency<\/strong> into the acrylic pipe. Then, by raising and lowering a water container connected to the bottom, we change the water level (the length of the closed pipe)<\/strong> inside.<\/p>\n

Suddenly, at one very specific depth, the sound jumps out\u2014”WAH!”\u2014becoming surprisingly loud. This is what we call resonance<\/strong>.<\/p>\n

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Hunt for the “Nodes” and “Antinodes” of the Sound!<\/h3>\n

If you listen closely, you will find several distinct spots where the volume spikes. We vary the lengths and measure the air column at each of these points.<\/p>\n

Inside the pipe, a phenomenon called a standing wave<\/strong> is occurring\u2014it looks as if the wave has stopped moving. Finding the spot where the sound gets loudest means you have located the place where the air vibration is most intense (the antinode). In this experiment, measuring the difference in length between two resonance points allows us to calculate the speed of sound<\/strong>.<\/p>\n