Chapter 2: The Nature of Sound: Lesson 1
How much matter or mass it has in a given volume.
What is density?
The loudness of different sounds is compared using ______.
What are decibels?
The inner ear, the middle ear, and the outer ear.
What are the 3 main parts of the ear?
Energy is defined as the ability to ___ ____.
What is energy defined as?
It is the wave with the lowest frequency.
What are radio waves?
Sound waves move at a speed of ___ m/s.
What is the speed of sound?
The range of frequency a human can hear is ___-___ hertz.
What is the range of frequency a human can hear?
The 3 smallest bones in your body are the ___,____, and ____.
What are the 3 smallest bones in the body?
Explosions of stars produce this wave.
How are gamma rays produced?
The higher the frequency, the higher ___ is has.
If a wave has a higher frequency, what else becomes higher?
It is a disturbance that travels through a medium as a longitudinal wave.
What is sound?
You use muscles in your throat do stretch and relax your ____ ____.
What do your muscles in your throat stretch and relax?
A liquid filled cavity shaped like a snail shell.
What is the cochlea?
Sound waves do not always travel in ____ lines.
Do lines always travel in straight lines?
The electromagnetic spectrum is made out of ____ waves, ____ waves, ____ waves, ____ waves, ____ waves, ____ waves, and ____ waves.
What waves make up the electromagnetic spectrum?
Sound waves ____ around obstacles or corners.
What happens when sound waves hit a obstacle or a corner?
The amount of energy a sound wave carried per second.
What is intensity?
The hair cells in your cochlea move, causing messages to be sent to the _____ ______.
Where do the messages caused from moving hair cells in your cochlea go?
The height of a transverse wave's ____ depends on its ______.
What determines the height of a transverse wave's crest>
These waves move at the same speed in a vacuum.
What are electromagnetic waves?
When the particles of the medium are more compressed, they quickly spread out again.
Why does sound travel faster in stiffer mediums?
The motion of the source causes the waves to either get close together or spread out.
What is the doppler effect?
It turns sound waves into a electrical signal.
What is a sound processor?
These are related by a mathematic formula.
How are the speed, wavelength, and frequency related?
Cellular phone communication and R.A.D.A.R.
What are some uses of microwaves?