Sound 1
Sound travels from one place to another as sound waves.
How does sound travel?
Hertz (Hz)
What is the SI unit for frequency?
Outer ear, Middle ear, & Inner ear
What are the three parts of the human ear?
A sound perception of how high or low a sound seems.
What is pitch?
A __________ is something that emits light.
What is a light source?
A longitudinal wave that can travel only through matter.
What is a sound wave?
Sound waves travel _________ in solids.
faster
Collects sound waves
Outer ear
The __________ of the sound makes a pitch higher or lower.
What is frequency?
Light is a type of wave called an ______________.
What is an electromagnetic wave?
Solids, liquids, and gas
What can sound waves travel through?
The number of wavelengths that pass a given point in one second.
What is a frequency?
Amplifies sound waves
Middle ear
Air from your lungs pushes through the space between your vocal cords, which vibrate and produce sound waves.
How do you produce sound waves when you speak?
Light waves travel __________ than sound waves.
What is faster?
The region where molecules are closer together.
What is compression?
The distance between a point on a wave and the nearest point.
What is a wavelength?
Converts vibrations to nerve signals that travel to the brain
Inner ear
A reflected sound wave.
What is an echo?
This type of electromagnetic waves has the longest wavelength.
What are radio waves?
Rarefaction is the region where molecules are farther apart.
What is rarefaction?
The speed of a sound wave in a material ________ as the temperature of the material __________.
increases & increase
Sounds with frequency between about 20 and 20,000 Hz.
What frequencies can humans hear?
__________ use reflected sound waves to locate objects underwater.
What are sonar systems?
The entire range of electromagnetic waves.
What is the electromagnetic spectrum?