Sound Basics
Properties of Sound
Modeling and Explaining Sound
Applications of Sound
Sound Waves Fun Facts
100
Sounds are created by _____________
Vibrations
100
This property determines how high or low a sound is
Pitch
100
What wave is louder?
Bottom wave. Higher amplitude = louder.
100
A sound wave reflecting off a surface is called this
Echo
100
Humans hearing ranges from ______ - ________ Hz
20 - 20,000 Hz
200
The highest and lowest points of a sound wave are known as
Peaks and valleys
200
The loudness of a sound depends on this property of the wave
Amplitude
200
What wave has the higher pitch?
Top wave (higher frequency = higher pitch)
200
Bats use this technique to navigate and hunt in the dark
Echolocation
200
Sound cannot travel through _____
space / a vacuum
300
Sound waves travel fastest through this type of medium: solid, liquid, or gas
Solids
300
This term describes how many sound waves pass a point in one second
Frequency
300
To test how sound changes when traveling through different materials, you can build this device commonly seen in childhood
A string telephone
300
This medical tool uses sound waves to create images of organs inside the body
Ultrasound
300
This animal is known for producing the loudest sound of any living creature, reaching up to 188 decibels
Blue whale
400
Sound waves need this to travel, unlike light waves
A medium
400
What property of materials determines how fast a sound wave can travel through it?
Density
400
This is the reason you can hear someone talking through a wall but not in outer space
Sound needs a medium to travel
400
These underwater sound waves are used by submarines to detect objects
Sonar
400
What is the speed of sound in air at room temperature (approximately)
340 m/s
500
This is the type of wave that sound travels as
Longitudinal wave
500
The unit used to measure the frequency of a sound wave
Hertz (Hz)
500
Sound energy is transformed into this kind of energy when you hear it
Electrical energy.
500
Animals like whales and elephants use this type of sound to communicate over long distances
Low frequency sounds
500
This is the loudest sound ever recorded on Earth
The Krakatoa volcanic eruption