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Purpose of experiment

Purpose of experiment. The purpose of our experiment today is to better understand how sound is effected when it hits different materials. This experiment is intended to build off of our prior knowledge or reflection and absorption and apply in further into practical use.

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Purpose of experiment

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  1. Purpose of experiment • The purpose of our experiment today is to better understand how sound is effected when it hits different materials. • This experiment is intended to build off of our prior knowledge or reflection and absorption and apply in further into practical use. • As the experiment goes on, think to yourself, “what roles do absorption and reflection play?”

  2. Materials needed • Check on your desks to make sure you have the following material; • Tin foil • Two foam boards • Three wood boards • One box • Speaker attached to a computer ready to blast some Bieber

  3. Introduction • You have been asked to be a part of the greatest tour in America, the Justin Bieber Experience. • Your role on the tour is to be a part of the stadium design crew. • It is your duty to design a stadium that is ideal for Justin’s voice to reach all of the crowd clearly without being to loud or soft. • You have been given three materials,(wood, metal, and foam), to which to work with.

  4. Introduction • In your group you will be asked to investigate, on a small scale model, which material reflects and absorbs the most and least amount of sound. Record your observation in your lab report sheet. • Have fun and do your best. Justin is counting on you!

  5. Step 1 • Predict what items you believe will be the best source for reflection? Absorption? (Tin Foil- Foam-Wood)

  6. Step 2 • Place each item in the box individually and play the song. Record your observations for each object below; -Tin Foil -Foam -Wood

  7. Step 3 • Infer why there were differences between the strength of the echoes when using the different materials?

  8. Analyze and Conclude • 1. How did the sound of the music change as you placed the different items in the box?

  9. Analyze and conclude • 2. Infer what was happening to the sound as each item was placed in the box.

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