Show:
The Basics of Sound Waves
How Do Sound Waves Interact?
Speed of Sound
Loudness vs Pitch
Doppler Effect
100
Sound waves are this type of wave.
What are longitudinal waves?
100
When sound waves bounce off surfaces.
What is reflection?
100

Sound usually travels fastest in this.

What are solids?

100
The pitch of a sound depends on this.
What is frequency of the sound wave?
100
The change in ________ of a wave as its source moves in relation to an observer is call the Doppler Effect.
What is frequency?
200
Sound waves begin with this.
What is a vibration?
200
When sound waves meet and interact with each other.
What is interference?
200
The more elastic a medium, the ________ sound travels.
What is faster?
200
Sounds that are too high for humans to hear.
What is ultrasound?
200
If a sound source is moving away from you, you will hear a ___________ pitch.
What is lower?
300
Sound waves need these to travel through.
What is a medium?
300
When sound waves bend and spread out.
What is diffraction?
300
Sound travels more ___________ in dense materials.
What is slowly?
300

The intensity or energy in a square meter of a sound is measured in this unit.

What are decibels?

300
If a sound source is moving toward you, you will hear a ________ pitch.
What is higher?
400
The distance from compression to compression in a sound wave.
What is wavelength?
400
An echo is an example of this.
What is reflection?
400
Sound travels more slowly at ____________ temperatures.
What is lower?
400
The greater the energy used to make a sound, the _______ the sound.
What is louder?
400
True or False? You are on a moving train and the whistle blows. Due to the Doppler Effect, you would hear a change in the whistle's pitch.
What is false?
500
The direction air particles move when they vibrate in a sound wave.
What is parallel to the direction of the wave?
500
Sound wave ____________ through openings and around barriers.
What is diffract?
500
In 1947, Captain Chuck Yeager became the first person to travel faster than the speed of sound in this.
What is a plane?
500
The amount of energy a sound wave carries per second through a unit area.
What is intensity?
500
A high energy wave that forms when sound waves overlap because the sound source is moving faster than the speed of sound.
What is a shock wave?