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1.3

Minor Versionm

by Suhail Ahanger

    • Handle scissors and cutters or any sharp tool carefully.

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

  1. Oboe made using straws of different stiffness.
    • Oboe made using straws of different stiffness.

  2. Flatten the end of a straw and cut the end of the straw in a triangular shape of about 2 cm.
    • Flatten the end of a straw and cut the end of the straw in a triangular shape of about 2 cm.

    • From side-on, the cut should look like a crocodile’s jaw!

    • Make one sample with the soft straw and another with the stiff straw.

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

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

    • Use straight straw.

  5. Mark the straw  at 2 cm and at the half of the straw. (around 7.5 cm) Flatten the end of a straw and cut the end of the straw in a triangular shape of about 2 cm. From side-on, the cut should look like a crocodile’s jaw!
    • Mark the straw at 2 cm and at the half of the straw. (around 7.5 cm)

    • Flatten the end of a straw and cut the end of the straw in a triangular shape of about 2 cm.

    • From side-on, the cut should look like a crocodile’s jaw!

  6. Starting from the uncut end of the straw, place the scissor at an angle such that you cut the straw into a spiral using up about half the length of the straw. Starting from the uncut end of the straw, place the scissor at an angle such that you cut the straw into a spiral using up about half the length of the straw. Starting from the uncut end of the straw, place the scissor at an angle such that you cut the straw into a spiral using up about half the length of the straw.
    • Starting from the uncut end of the straw, place the scissor at an angle such that you cut the straw into a spiral using up about half the length of the straw.

  7. Blow through the straw with the cut end in your mouth.
    • Blow through the straw with the cut end in your mouth.

    • The spiral should spin around. Even better if you can get the whistling sound as well as the spinning spiral!

  8. Oboe made with straws of varying length.
    • Oboe made with straws of varying length.

  9. Cut the straw into 2 pieces, one long and one short. Then make each one into a separate whistle. Flatten the end of a straw and cut the end of the straw in a triangular shape of about 2 cm.
    • Cut the straw into 2 pieces, one long and one short. Then make each one into a separate whistle.

    • Flatten the end of a straw and cut the end of the straw in a triangular shape of about 2 cm.

    • From side-on, the cut should look like a crocodile’s jaw!

  10. Fold the straw at 3 separate locations and nip one corner of the straw at each of these locations. This will create three nice diamond-shaped holes at these locations. Blow through the straw, with the cut end in your mouth, and you should produce a nice loud, constant sound!
    • Fold the straw at 3 separate locations and nip one corner of the straw at each of these locations. This will create three nice diamond-shaped holes at these locations.

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

  11. Oboe made with straws of varying gauge.
    • Oboe made with straws of varying gauge.

  12. Make one sample with the fat straw and another with the thin straw. Flatten the end of a straw and cut the end of the straw in a triangular shape of about 2 cm. From side-on, the cut should look like a crocodile’s jaw!
    • Make one sample with the fat straw and another with the thin straw.

    • Flatten the end of a straw and cut the end of the straw in a triangular shape of about 2 cm.

    • From side-on, the cut should look like a crocodile’s jaw!

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

    • Blowing too hard or slow would not make any sound.

    • If you are not able to make sound then try to press the pipe with your lips and blow air.

    • Triangular baby crocodile’s mouth (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.

    • If the diamond holes are too small such that no air escapes them, then no sound will be produced.

    • If the diamond holes are too big such that you can’t block them with your fingers, then you may not get the desired sound.

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

    • How would you describe the sounds from the different oboe types; harsh, whistle like, low, soothing, barely audible?

    • 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....

    • Be careful while handling scissors or other sharp tools

    • Don't move lips along the edges of ice cream sticks while blowing.

  15. Cut a strip of paper the same size as that of the ice cream stick Cut a strip of paper the same size as that of the ice cream stick Cut a strip of paper the same size as that of the ice cream stick
    • Cut a strip of paper the same size as that of the ice cream stick

  16. Cut out small pieces of cardboard strips with width equal to that of the ice cream stick and a maximum length of up to 2 cm. Cut out small pieces of cardboard strips with width equal to that of the ice cream stick and a maximum length of up to 2 cm. Cut out small pieces of cardboard strips with width equal to that of the ice cream stick and a maximum length of up to 2 cm.
    • Cut out small pieces of cardboard strips with width equal to that of the ice cream stick and a maximum length of up to 2 cm.

  17. Place the spacers at the two ends of the ice cream stick. Place the spacers at the two ends of the ice cream stick. Place the spacers at the two ends of the ice cream stick.
    • Place the spacers at the two ends of the ice cream stick.

  18. Use rubber bands to hold the ice cream sticks together. Blow between the sticks Do not press the sticks with lips too hard while blowing air out.
    • Use rubber bands to hold the ice cream sticks together.

    • Blow between the sticks

    • Do not press the sticks with lips too hard while blowing air out.

    • Paper reed width more than that of ice cream sticks. Keep the paper reed width within the width of ice cream sticks

    • Spacers too thin, thereby not leaving enough space for the paper reed to vibrate.

    • Putting too much pressure with the lips on the ice cream sticks would restrict the paper reed vibration.

    • Paper reed becoming wet while kept between the lips.

    • Blow at different places along the length of ice cream stick. How does the pitch of the sound vary from mid-point to the end of the mouth organ.

    • Insert more paper reeds between the sticks one by one. What is the change in the sound quality?

    • Close the other end of the mouth organ and draw the air in. Why isn't there any sound? How does the original mouth organ work by blowing as well as drawing air through it?

    • Use cardboard strips of varying widths. Use different thicknesses of paper reeds too.

    • Try thin polythene strips in between the ice cream sticks and cardboard strips.

    • Stack horizontally different lengths of oboe straws (consult "Sound - Oboe") along the length of the harmonica and between the ice cream sticks. Blow on the side of the `V'-cut of straws and enjoy the sound variations in a single blow.

  19. Take a balloon. Fold it in half so that you have a pointed tip at the bottom as shown in the figure Make a fine cut of about 3 mm from the bottom
    • Take a balloon.

    • Fold it in half so that you have a pointed tip at the bottom as shown in the figure

    • Make a fine cut of about 3 mm from the bottom

  20. The cut will leave a diamond  shaped hole at the bottom. The size of the hole should be "just" enough for the straw piece that is to be inserted through the hole.
    • The cut will leave a diamond shaped hole at the bottom.

    • The size of the hole should be "just" enough for the straw piece that is to be inserted through the hole.

  21. Cut the bottle in half or one third using a paper cutter and/or scissor. Cut the bottle in half or one third using a paper cutter and/or scissor.
    • Cut the bottle in half or one third using a paper cutter and/or scissor.

  22. Stretch the mouth of the balloon  and place it over the mouth of the bottle. Ensure that the mouth of the balloon is firmly fixed over mouth of bottle and is air-tight.
    • Stretch the mouth of the balloon and place it over the mouth of the bottle.

    • Ensure that the mouth of the balloon is firmly fixed over mouth of bottle and is air-tight.

  23. Insert one end of the straw piece through the hole made at the bottom Secure  the end of straw piece and balloon with rubber band. The rubber band must be tied firmly such that no air escapes through the balloon-straw interface.
    • Insert one end of the straw piece through the hole made at the bottom

    • Secure the end of straw piece and balloon with rubber band.

    • The rubber band must be tied firmly such that no air escapes through the balloon-straw interface.

  24. Blow hard through the straw piece to hear the loud trumpet sound. The straw piece should be lower than that of bottle mouth for the bugle to work.
    • Blow hard through the straw piece to hear the loud trumpet sound.

    • The straw piece should be lower than that of bottle mouth for the bugle to work.

    • The level of straw piece is higher than that of bottle mouth.

    • Balloon is not stretched enough while blowing.

    • Not blowing hard enough

    • Rubber bands too loose

    • Stretch the balloon and blow through it at different lengths, Describe how does the sound differ?

    • Use a frequency measuring app available on App store/Play store and measure the frequency range of the sound produced.

    • What sort of energy conversion takes place when you blow ?

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Suhail Ahanger

Member since: 05/02/2017

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