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* 1. Please enter your name:

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* 2. Group:

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* 3. What makes sound?

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* 4. When you talk, sound travels through the air as

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* 5. The energy of sound waves is always very small and can only be detected by our ears or other sensitive instruments

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* 6. Which of the following is NOT a cause of vibration for musical instruments?

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* 7. When an object is made to vibrate at its natural frequency of vibration, we say the object is

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* 8. What causes a tuba to have lower sounds than a trumpet?

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* 9. A violin is basically a hollow wooden box with strings across it.  If the wooden box were replaced by a solid piece of wood, the violin would sound

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* 10. The organ pipe shown in the diagram produces a certain musical pitch.  Which of the other four organ pipes shown would produce the same pitch?

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* 11. If a person blows over the top of the pipes shown in the diagram, which pipe will make a lower sound?

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* 12. Low pitch is

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* 13. The pitch of sound depends on the

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* 14. Treble notes are high on the musical scale.  The vibrations producing treble notes have

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* 15. Humans can hear sound with wavelengths that range from half an inch and to 50 feet.  Bass notes are low on the musical scale and have

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* 16. What part of the ear is used to collect and funnel sound down the ear canal?

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* 17. If all the waves shown above are shown for equal lengths of time,
Which of the options has a larger amplitude than the original wave?

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* 18. If all the waves shown above are shown for equal lengths of time,
Which of the options has a larger frequency than the original wave?

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* 19. Which distance, labeled above, is equal to one wavelength

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* 20. Hair cells in different parts of the cochlea respond to different frequencies

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* 21. Sound waves hit the eardrum and cause it to vibrate

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* 22. The vibrations continue through the ossicles in the middle ear and travel to the cochlea

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* 23. Sound that is too loud can damage the tiny hair cells of the inner ear.

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* 24. The hair cells turn the vibrations into electrical signals that are sent to the brain.

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* 25. Being around loud sounds a lot will help your ears get used to it and protect your hearing.

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* 26. The more time I spend around loud sound, the worse my hearing will be.

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* 27. Hair cells in the cochlea can be fixed after being damaged by loud sounds.

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* 28. Please describe what the general characteristics of musical instruments are. How do they

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* 29. What determines the natural frequency in each of the following instruments?

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* 30. Consider how each of the following instruments amplify sound. What makes them loud?  For each instrument provide three things: 1. Is the mechanism resonance or sympathetic vibration, 2. What part of the instrument makes it loud, 3. Why do you think this?

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