Changing Pitch and Loudness
If you have a skinny elastic and a fat elastic, which one will make the higher pitch and which one will make the lower pitch?
Skinny elastic=high pitch Fast elastic = low pitch
What shape is the Cochlea? What does it do?
It is shaped like a snail shell. It passes vibrations through its thin hair like structures to send a message to the nerves and brain.
The glass at the Winspear was put up because the lobby was too noisy. What did the glass do to help this problem?
The sound bounced off the glass and stayed on one side.
How is sound made?
Sound is caused by the vibration of an object.
What are some sounds that can damage our hearing?
-Plane taking off -Concerts -Construction machines
Conrad made a guitar with a ruler, two elastic bands and a box. He wants to make the sound louder. He should: a. use one elastic b. use a larger box c. pluck the elastics harder d. pluck the elastics more gently.
c. plus the elastics harder
Where is the eardrum? What is the point of the eardrum?
The point of the eardrum is to make it vibrate. The vibrations pass through three bones of the middle ear.
Imagine your teacher lost her voice. How could she speak softly but still have the Grade 3 students hear her?
Use a microphone or speak through a funnel
Amy learned that vibration is another word for wave. Which of these produces waves, but NOT the sort of wave we can hear?
a. sun b. rain c. wind d. thunder
a. sun
What are some ways you can prevent damage to your ears?
What is wearing ear protection, moving away from loud noises, covering your ears.
David learned that sound is a result of vibrations and the faster the vibration: a. the lower the pitch b. the higher the pitch c. the softer the sound d. the louder the sound
b. the higher the pitch
What makes up the outer ear?
Outer ear, ear canal, and ear drum.
How does the thunderdrum work?
When you hit the wire attached at the bottom the vibrations move up the wire into the cup to make a sound.
What is the best matter for sound to travel through? a) Solid b) Liquid d) Gas
Solid
What is a decibel?
A decibel measures the volume of sound.
If you take a ruler and hang a long part off of the edge of the desk and bang it, would it cause a high pitch or a low pitch?
Low pitch
What part of the ear carries a message about the sound to the brain?
auditory nerve
How can you make a sound louder?
Increasing the vibrations.
What happens to the loudness of the sound, as we move away from the sound source?
The loudness decreases
Are there other ways to communicate besides using sound?
Sign language, writing things down etc...
If you take a ruler and hang a small part off of the edge of the desk and bang it, would it cause a high pitch or a low pitch?
High pitch
What are the three bones in the ear called?
Hammer, Anvil, Stirup
If you had to absorb a sound, what material would you use? a. glass b. wood c. fabric d. concrete
c. fabric
What happens to the volume of the sound, as we move closer to the sound source?
The volume increases
1. something you hear
2. an energy that is created by vibrations
3. moves in all directions
4. moves as sound waves
5. needs a matter to move through (no oxygen in space)