The distance from the middle of one compression to the middle of the next
Wavelength
The sound of a large bell is (lower/higher) than the sound of a small bell
LOWER Bigger bell vibrates slower = lower pitch
place where the air molecules are pressed together
compression
Percussion instruments played by ______________
HITTING
between the compressions, the molecules spread apart
Rarefaction/expansion
To move rapidly back and forth
vibrate
The pitch will be lower if the tension of the string (increases/decreases)
DECREASE If the string is looser(decrease in tension), it will vibrate slower = lower pitch
how high or low sound,
pitch
A wave that carries sound energy
Longitudinal Wave
A material through which a wave travels
medium
Long strings have (higher/lower) pitch than short ones
LOWER Longer strings vibrate slower = lower pitch
Unit of measure for loudness of sound
DECIBELS
The distance that a vibrating object moves as it vibrates
amplitude
the number of vibrations(sound waves) per second
Wave Frequency
form of energy produced by a vibrating object
sound
low pitch means _______frequency
low
the height of the sound wave
amplitude
Sound energy travels (inward or outward) from a vibrating object
outward
Sound travels faster through ________ (solid, liquid, or gas)
solid
Height or distance of a sound wave
amplitude
Opposite of compression
rarefaction
A measurement of the loudness of sound
DECIBEL
The higher the amplitude, the ________ the sound
louder
sound waves are ________ waves
longitudinal
How high or low a sound is
pitch
The more energy you put into an instrument, the _________ the sound
louder
Low frequency, ________ pitch
low
Sound is made when something ___________
vibrates
How many wavelengths?
3
Which diagram has a higher pitch?
The diagram on the left – if has a higher frequency (more wavelengths per second)
Which if louder?
The diagram on the right has a higher amplitude which means it has a louder sound.
Write what type of wave – blue and red waves
Label the parts of the waves Wavelength Crest