Vocabulary
The number of waves that pass a point in one second.
Frequency
Sound is a ______________ that can be heard
Vibration
The loudness or softness of a sound is called its ______________
Volume
How are singing and speaking similar?
They both are caused by vibrations of the vocal cords.
Pitch
How high or low a sound is.
The distance from one compression to the next
Wavelength
Wave
Most sounds we hear travels through _______
air
Sound waves that travel through matter are described as ________________ waves.
mechanical
Acoustics
The science of sound.
a rapid, back and forth movement
Vibration
Sound travels faster through a ___________ than a gas.
Solid
The intensity of sound is measured in _____________
Decibels
Objects that vibrate ___________ have a high pitch.
quickly
Oscilloscope
a machine that changes sound waves into electrical pictures seen on a graph
the part of the wave where the motion of each vibration pushes together some of the particles of the matter
Compression
A vibration that can be heard is called _____________
Sound
The quality of a sound that distinguishes it from other sounds is called _________________
Timbre
Surfaces that are ________ and hard, reflect sound.
Smooth
a type of echolocation that locates items underwater
the part of the wave where the motion of the vibration moves away from the compression and the particles spread apart again
rarefaction
The pitch of a sound is related to its _____________
A sound that bounces back toward its source and is heard again is called ________________
an echo
Materials that are rough, soft, or fuzzy _______ sound.
absorb
Ultrasound
the echoes of high-frequency sound waves to "see" inside a human body