Changing Pitch and Loudness
Parts of the Ear
Sound Proofing and Amplifying Sound
Properties of Sound
Odds and Ends
100
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
100

Where is the pinna? What does it do?

Outer ear.  It captures sound waves or vibrations.

100

How does a megaphone work?

The megaphone increases volume by directing the sound waves.

100

How is sound made?

Sound is energy caused by the vibrations 

100

What are some sounds that can damage our hearing?

-Plane taking off -Concerts -Construction machines

200
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
200

Where is the eardrum? What is the point of the eardrum?

The ear drum is part of the outer ear.  It’s job is to catch vibrations and send them to the inner ear.

200

Imagine Mrs. Budgen lost her voice. How could she speak softly but still have the Grade 3 students hear her?

She could use a microphone, cup her hands together at her mouth, or use a megaphone

200

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

200

What are some ways you can prevent damage to your ears?

Listen to music at safe levels

Use noise cancelling headphones

Limit time in loud environments

Do not put objects in your ear

300
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
300

What makes up the inner ear?

hammer

anvil

stirrup

300

Why would you sound proof a room? What does it do to the volume of the sound?

To make sounds quieter or to block sound from being heard.  i.e.  A loud music room or a teenager’s room

300

What is sound measured in?

Decibels (dB)

300

Why is sound important?

communication

enjoy the world around us

warning of danger

400
If you take a ruler and hang 20 cm off of the edge of the desk and bang it, would it cause a high pitch or a low pitch?
Low pitch
400
What part of the ear carries a message about the sound to the brain?
auditory nerve
400

How can you make a sound louder?

Apply more energy to banging, strumming or blowing.

400

What happens to the loudness of the sound, as we move away from the sound source?

The loudness decreases

400

Are there other ways to communicate besides using sound?

Sign language

mime

writing

500
If you take a ruler and hang 5 cm off of the edge of the desk and bang it, would it cause a high pitch or a low pitch?
High pitch
500

How does the ear work?

The ear collects sound waves and passes the vibrations to the middle ear and on to the inner ear.  The inner ear changes the vibrations to nerve signals that send messages to the brain

500

If you had to block a sound, what material would you use? a. soil b. sawdust c. styrofoam d. concrete

c. styrofoam

500

What is the frequency of pitch measured in?

Hertz (Hz)

500

Give some examples of how animals hear differently that people?

Animals hear at different freequencies.

eg. bats, dogs

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