Definitions
Sound waves
Our Ears
Decibels
Instruments/pitch
100
What does vibration mean?
to move back and forth
100
A loud sound makes a __________ vibration (large or small?)
large
100
acts like a funnel - gathers sound and funnels it to the inner ear (eardrum)
the outer ear (pinna)
100
What device is used to measure sound?
decibel meter
100
Long strings have a (higher / lower) pitch than short strings.
lower
200
What is pitch?
How high or low a sound is
200
A quite sound makes a ________ vibration (small or large)
small
200
the eardrum ________ when sound waves hit it
vibrates
200
What decibel level would a whisper be? Safe or danger?
about 20 decibels = safe
200
short strings vibrate (faster/slower) than long strings
faster (= higher pitch)
300
What is the Pinna?
The outer part of the ear. It is made of skin and bone
300
Do sound waves travel in all directions?
yes
300
What are the 3 main parts of the ear called
the outer ear, middle ear and inner ear
300
What decibel level would a jet plane be? Safe or not?
140 decibels. Danger! Could cause hearing loss.
300
We made instruments to help us show how they can produce different
pitches
400
What is volume
the degree of loudness
400
Amplify means
to make a sound louder.
400
The middle ear has 3 tiny bones in it. What are they called?
The hammer, anvil, and stirrup
400
list 3 ways we could protect our ears from loud noises
Reduce the volume (ex. turn down stereo/headphones), Reduce the time (ex/ rock concert for 2 hours is okay but not everyday!) Wear hearing protection (ex/earplugs, headphones)
400
How could you change the pitch when blowing in a water bottle?
Add more/less water. The more water the higher the pitch. less air = faster vibrations = higher pitch
500
What is a decibel?
a unit used to measure the volume of a sound
500
What do singers use at concerts to amplify their voice?
a microphone
500
Using a diagram, explain how sound travels through the ear
A sound is made. The outer ear gathers the sound and funnels it through the inner ear to the eardrum. The eardrum vibrates when sound waves reach it. From there, the sound is transmitted by three tiny bones (the hammer, anvil, and stirrup) to the inner ear. Where nerves carry the message to the brain. Our sound memory helps us recognize the sound.
500
What decibel level would a normal conversation be at?
60-65 decibels = safety range
500
How could you make drums different pitches?
smaller drums would have less air inside = higher pitch because the air vibrates faster when hit. Larger drums would have more air inside = lower pitch because the air vibrates slower when hit.
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