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1.2

Major VersionM

by Procheta Mallik

Introduction

Flatten the given plastic straw and cut one end of it in a `V' shape. Place the cut end into your mouth and blow to create sounds. You can cut the straw to varying lengths to change the frequency of the sound, or make holes in the straw (like a flute!) and create multiple notes from a single straw.

Tools

Parts

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    • Handle scissors and cutters or any sharp tool carefully.

    • Be careful not to insert the straw too far into your mouth.

  1. Take two straws, one straight and one bendable straw. Cut the straight straw in to two pieces such that the smaller piece is 5 cm long. Keep the bendable straw aside as we will use it afterwards.
    • Take two straws, one straight and one bendable straw.

    • Cut the straight straw in to two pieces such that the smaller piece is 5 cm long.

    • Keep the bendable straw aside as we will use it afterwards.

  2. Measure and mark approximately 2 cm away from one end using a sketch pen or marker. Now flatten the marked end of the straw piece and cut in a triangular 'V' shape, like an arrowhead. When viewed from the side, the cut should look like a crocodile's jaw!
    • Measure and mark approximately 2 cm away from one end using a sketch pen or marker.

    • Now flatten the marked end of the straw piece and cut in a triangular 'V' shape, like an arrowhead.

    • When viewed from the side, the cut should look like a crocodile's jaw!

  3. Now repeat the process with the longer straw piece. Now repeat the process with the longer straw piece. Now repeat the process with the longer straw piece.
    • Now repeat the process with the longer straw piece.

  4. Now take the Bendable straw and cut it below the bendable part. Take the longer piece, flatten the end of the straw and cut it in a triangular shape of about 2 cm, exactly like in Step 2.
    • Now take the Bendable straw and cut it below the bendable part.

    • Take the longer piece, flatten the end of the straw and cut it in a triangular shape of about 2 cm, exactly like in Step 2.

  5. Fold the straw at 3 cm from the end of the V cut. Cut a small triangle at one of the two corners to make a diamond shaped hole. Note that, to have the holes on the "top" of the oboe rather than the "sides", you have to bend the straw in a way that the "V" shape on the pipe is perpendicular to the line where you bend the straw. Make another hole 3 cm away from the previous hole.
    • Fold the straw at 3 cm from the end of the V cut. Cut a small triangle at one of the two corners to make a diamond shaped hole.

    • Note that, to have the holes on the "top" of the oboe rather than the "sides", you have to bend the straw in a way that the "V" shape on the pipe is perpendicular to the line where you bend the straw.

    • Make another hole 3 cm away from the previous hole.

  6. Play the oboe by placing your lips at the end of the V cut. Compare the sound hence produced with other scenarios listed in the observation table and record your observations. Play the oboe by placing your lips at the end of the V cut. Compare the sound hence produced with other scenarios listed in the observation table and record your observations. Play the oboe by placing your lips at the end of the V cut. Compare the sound hence produced with other scenarios listed in the observation table and record your observations.
    • Play the oboe by placing your lips at the end of the V cut. Compare the sound hence produced with other scenarios listed in the observation table and record your observations.

    • You now have 3 separate oboes. Play with them individually first.

    • Blow through the straw, both short and long, with the cut end in your mouth, and you should produce a nice loud, constant sound!

    • Now do the same with the multi-note oboe; block the holes with your fingers and play the straw like a flute!

    • You may now also try and play by placing 2, if not all 3, oboes in your mouth and playing them simultaneously.

    • Blowing too hard or slow.

    • Triangular "crocodile’s jaw" (reed) is too small.

    • Not enough of the reed inside the mouth.

    • The straw not flattened enough at the cut, i.e. the reeds are too far apart.

  7. Does the straw produce the sound when we vary the placement of the lips on it? If yes, are the sounds same or different? How many distinct notes can you produce through your multi-note oboe? Use the observation table to make your observations about different oboes.
    • Does the straw produce the sound when we vary the placement of the lips on it? If yes, are the sounds same or different?

    • How many distinct notes can you produce through your multi-note oboe?

    • Use the observation table to make your observations about different oboes.

    • Try to check the frequency of the sound produced for each note, download the app Science journal on this link https://play.google.com/store/apps/detai....

  8. Oboe made using straws of different stiffness in the material. A spiral is made along with the oboe to create a spinning "trunk" as you blow through the oboe. Oboe made with straws of different diameters.
    • Oboe made using straws of different stiffness in the material.

    • A spiral is made along with the oboe to create a spinning "trunk" as you blow through the oboe.

    • Oboe made with straws of different diameters.

  9. Oboe made with straws of varying length. Multiple notes on one straw oboe.
    • Oboe made with straws of varying length.

    • Multiple notes on one straw oboe.

    • If you want to learn, how to make these variations please click on this link Sound - Oboe (Variations).

Finish Line

One other person completed this guide.

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Kailash NR

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