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Exploring Sound: Experiments with Tuning Forks and Pitch

Dive into the fascinating world of sound with Andrew Cobb and Ionut Albu's engaging experiments. Discover what makes the balloon "scream" as you explore sound production, transfer, and the effects of vibrations. Learn about sound waves, wavelength, amplitude, and frequency while conducting hands-on activities using tuning forks, ping pong balls, water, and even a "clucking chicken" experiment. Unveil the mysteries of pitch and vibrations through interactive learning, ensuring each group member plays a part in the fun. Perfect for young scientists eager to understand the physics of sound!

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Exploring Sound: Experiments with Tuning Forks and Pitch

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Presentation Transcript

  1. Did You Hear That? By Andrew Cobb & IonutAlbu

  2. The “Screaming” Balloon • What made the balloon “scream”? • Key Question: • What is sound, how is it made and transferred?

  3. Tuning Fork & Ping Pong Ball • DO NOT HIT THE TUNING FORK ON YOUR DESKS. ONLY USE THE PALM OF YOUR HAND. • One group member hit the tuning fork, another touch the ping pong ball to the tuning fork • Be sure to make a prediction before you start the experiment • Let each member of the group give it a try

  4. Tuning Fork & Water • Hit the tuning fork (again only using your palm) and place it in the water • Be sure to only put the tuning fork in about half an inch • Don’t touch the tuning fork to the side of the glass, this will mess up your results

  5. The “Clucking Chicken” • Be careful with how you pull on the string • Try it first without wetting the sponge, holding the cup • Then try it with a wet sponge, holding the cup • Then, while also using a wet sponge try it holding the string and not the cup

  6. Sound Wave Wavelength Amplitude

  7. Wavelength and Frequency Short Wavelength Long Wavelength

  8. Pitch • Pitch makes a sound “high” or “low” • Depends on frequency • Objects with less matter vibrate faster • Faster vibration = Higher frequency • Higher Frequency = Higher pitch • Objects can vibrate or the air inside of them, this affects the kind of pitch you get.

  9. Predict Pitches for each Bottle:Struck ✓ ✓ ✓

  10. Predict Pitches for each Bottle:Blown ✓ ✓ ✓

  11. Review • Sounds • are made by vibrations. • travel as waves. • Waves • have energy. • are measured from peak to peak or trough to trough. • Frequency measures the number of vibrations in one second. • Pitch • How “high” or “low” a sound is and depends on frequency

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