Pitch and Volume
Human Ear
How Sound Travels
Sound and Safety
Misc.
100
Draw an example of a high pitch and low pitch using sound waves.
100
Name the 3 bones in the human ear?
the hammer, anvil, he stirrup.
100
Sound is _______________ that travel through a variety of matter?
vibrations
100
Name 1 unpleasant sound and 1 pleasant sound?
answers will vary
100
How do we measure volume?
in decibels
200
A low pitch has a _____________ wavelength?
A low pitch has a long wave length while a high pitch has a short wave length.
200
What are the two parts of the outer ear called?
Pinna and ear canal.
200
Sound travels in which direction?
in all directions
200
What happens to our ears as we age?
Our ears are damaged over time due to extended exposure to loud noises. This means you are unable to hear higher frequencies.
200
How could you sound proof an alarm clock?
answers will vary.
ex) put a pillow over the alarm to muffle the noise
300
If I was playing a guitar the thinner cords would have what type of pitch?
what is a higher pitch
300
This part of our body interprets the sound waves?
the brain
300
When a sound wave hits a solid surface it bounces back, this is called an ___________.
echo
300
How do workers protect their ears?
wearing headphones or earplugs
300
What is a device that amplifies sound?
megaphone, speaker, pylon
400
We measure pitch in?
We measure pitch in Hertz. The human ear can hear between 20 Hz (low pitch) and 20, 000 Hz ( high pitch). The older you get the more damaged your ears become you are unable to hear higher frequencies. 
400
Tell me how the ear drum works?
Your eardrum is a really important part of your ear. Sound waves travel through the ear canal to reach the eardrum. The eardrum is a thin flap of skin that is stretched tight like a drum and vibrates when sound hits it. These vibrations move the tiny bones of the middle ear, which send vibrations to the inner ear.
400
Sounds travel best though a solid, liquid, or gas?
solid
400
Name two jobs that need to wear ear protection?
answers will vary
ex) musicians, lumberjacks, machine operators, construction workers, airport workers
400
A long pipe makes a _________ pitch and a short pipe makes a __________ pitch.
low
high
500
What does amplify mean?
To increase the volume. A megaphone amplifies sound by directing the sound waves in the direction it is pointing.
500
The _______ is a portion of the inner ear that looks like a snail shell. The ______ receives sound in the form of vibrations, which cause the stereocilia (tiny hairs) to move. The stereocilia then convert these vibrations into nerve impulses which are taken up to the brain by the auditory nerve to be interpreted.
Cochlea
500
Name two animals that use echolocation to find their food?
dolphins and bats
500
What does it mean to be hearing impaired?
People who are hearing impaired are unable to hear. They usually have damage to their inner or middle ear. People who are hearing impaired use sign language to communicate.
500
Why does sound travel best through a solid?
The particles are closer together so the vibration connects quicker to the particles beside it.
