Sound energy, Sound
- 1. Sound Energy
- 2. What is sound? Sound is – A form of energy made by vibrations. – When an object vibrates it causes the air particles around it to move. – These particles bump into particles close to them and this continues until they run out of energy.
- 3. Try this: Putyour finger on your neck and say “aah” as loud as you can. Now say it as soft as you can. You can not only hear the sound, but you can feel the vibration inside your throat.
- 4. How does sound travel? Soundtravels through all forms of matter— gases, liquids and solid. These are called the medium. Sound cannot travel through a vacuum.
- 5. What is pitch? Pitch is how high or how low a sound is. This is a high pitched sound. This is a low pitched sound.
- 6. How does sound travel? Sound passes through the medium as longitudinal waves. When the vibrations are fast you hear a high pitch. When they’re slow, you hear a low pitch. High Pitch Low Pitch
- 7. How else can we change sound? We can make it louder or softer by changing the amplitude of the height of the wave. The higher the amplitude, the louder the sound. The lower the amplitude the softer the sound. Louder Softer
- 8. How do musical instruments create sound? Itdepends on the type of instrument. There are four types. – Woodwind – String – Percussion – Brass
- 9. Woodwinds Instruments Woodwinds make music by blowing on the top of the instrument or on a reed. Clarinet Bassoon Oboe Flute Piccolo
- 10. String Instruments Strings make music by plucking or strumming the strings. Cello Guitar Harp Violin Electric Guitar
- 11. Percussion Instruments Percussion instruments make music by striking, shaking or scraping them. Tambourine Piano Drum Xylophone Maracas Cymbals
- 12. Brass Instruments Brass instruments make music by buzzing lips while blowing. Trombone French Horn Tuba Trumpet
- 13. Did you know? Sound travels 4 times faster through water than through air. There is no sound in space. Geologists use their knowledge of how sound travels through rocks to help them find oil fields.