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Sound and Waves

Sound and Waves. Integrated Science. Sound Waves Description. Light waves are transverse waves. Sound waves are longitudinal waves. Variations in Air Pressure and Corresponding Waveform. Relating the Two Wave Types. Wave Properties and Sound. A large amplitude = loud sound

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Sound and Waves

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  1. Sound and Waves Integrated Science

  2. Sound Waves Description • Light waves are transverse waves. • Sound waves are longitudinal waves.

  3. Variations in Air Pressure and Corresponding Waveform Relating the Two Wave Types

  4. Wave Properties and Sound • A large amplitude = loud sound • Areas of compression are wide. • A high frequency = high pitch • Areas of compression are close together.

  5. Sound Waves and Instruments • To make sound, musical instruments vibrate. • Vibrations from the instrument cause the longitudinal waves to form. • The frequency and size of the vibrations determine the pitch and volume of the sound.

  6. Musical Instruments • How they work… • A wave is made and then amplified within the instrument. • Woodwinds  The reed makes the wave. • Brass  Your lips make the wave. • String  Plucking a string makes the wave. • Percussion  Hitting the drum makes the wave.

  7. How We Hear Sound Outer Ear • Sound Waves hit our outer ear and eardrum causing it to vibrate.

  8. How We Hear Sound Middle Ear • The eardrum vibrating causes three tiny bones in the ear to vibrate. • The three tiny bones cause liquid inside the ear to vibrate.

  9. How We Hear Sound Inner Ear • The vibrations from the liquid inside the inner ear communicate with nerves that send the sound to our brain.

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