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A World of Sounds
Contents
• 1. Sounds
• 2. Wind Instruments
• 3. String Instruments
• 4. Percussion Instruments
• 5. How we hear sounds.
• 6. Brass Instruments
• 7. The violin
• 8. Shake, rattle and roll.
End Show
Sounds• Sounds are created by something
vibrating (moving very fast). The vibrations set up sound waves in the surrounding air.
• Sounds move like waves in water but much faster.
• Sound waves are detected by the air in the ears.
• Instruments make sounds: Wind instruments String instruments Percussion Instruments
Wind Instruments
• The player’s breath makes the sound in a wind instrument.
• The breath flows through or across
a hole or an edge or causes a reed to vibrate.
String Instruments• String instruments use tightly
stretched string or wire to make a sound.
• The player
plucks
hammers
or strokes the string to make a sound.
Percussion Instruments
• Percussion is the name given to instruments that create sound by being
scraped
shaken
hit or struck
How we hear sounds
• Sound waves reach the outer ear and makes the ear drum vibrate.
• This makes 3 little bones move inside the inner ear.
• The fluid in the snail-shaped organ moves.
• Tiny hair cells inside also detect the movements.
• Signals are sent to the brain by the auditory nerve.
Brass Instruments
• This is a trumpet.• A trumpet is a valved,
wind instrument.• All notes in the
trumpet’s range can be played using a combination of three valves.
• Pressing on the valves changes the length of tubing that the air flows through.
• The shorter the tube, the higher the note.
The violin
• The violin is a string instrument.
• A bow is used to slide back and forth across the strings.
• The player changes the pitch of the strings by holding his fingers against the strings.
• The player can also pluck at the strings.
Shake, rattle and roll
• These are all untuned percussion instruments.
• The pitch cannot be altered.
• A percussion player has to learn to play all kinds of instruments.
• Evelyn Glennie is a famous percussionist. She ‘feels’ the sounds as she is deaf.