What sound is typically lower a girl's voice or a boy's voice?
A boy's voice
100
What word tells how high or low a sound is?
Pitch
100
What do humans use for sound receivers?
EARS!
200
Sound travels slowest through what medium?
Air
200
When the outer ear funnels sound waves this causes the_________ to vibrate.
ear drum
200
Why would it be difficult to distinguish the sound of a dropped penny and the sound of a dropped car key?
Because they have similar sound properties
200
Define loudness?
Your perception of energy of sound. Depends on the energy given to make the sound and the distance from the source of the sound.
200
What three things affect the speed of sound?
density, temperature, and elasticity
300
Sound travels fastest through what medium?
Solid
300
For an object to become higher in pitch it must first become _________ in length?
shorter
300
What are the three ways sound waves interact?
reflection, diffraction, interference
300
What are vibrations?
The shaking that produces sound
300
Which type of pitch creates more vibrations?
High Pitch
400
Why would there be no sound in space?
Because there is no medium for the sound to travel through
400
Which creates a higher pitch a low frequency or a high frequency?
High Frequency
400
What is the difference between reflection and diffraction?
Reflection is when the sound waves bounce off a surface (echo), while diffraction is when the sound bends around corners and goes though doorways.
400
What is the job of the cochlea?
When the cochlea is vibrated it causes a nerve impulse and sends these messages to the brain.
400
How does temperature affect the speed of sound?
The cooler the temperature the slower sound travels through. The warmer the temperature the faster sound travels through.
500
If you were swimming with a friend, and your friend was under water while you were above water who would hear the sound of a passing boat first?
The friend under water
500
Does a low frequency or high frequency produce long spread out sound waves?
Low Frequency
500
Give an example of interference.
Several answers possible.
500
What word tells the rate at which sound waves travel?
Frequency
500
Explain the process of how we hear sound.
The outer ear funnels sound waves into the inner ear. Sound waves make the ear drum vibrate. Tiny bones in the middle ear transmit vibrations to the inner ear. Vibrations in the cochlea of the inner ear send messages to the brain.