Sound Waves
how does temperature affect the speed of sound? why does this happen?
At lower temperatures, molecules collide more often, giving the sound wave more chances to move around rapidly
what two factors affect the speed of a sound wave?
The speed of sound is affected by the medium air, water, or metal and the temperature.
vibration
a rapid back and forth motion
what is the anvil
a tiny bone
hertz(hz)
a unit of frequency equal to one cycle per second
what is a transverse wave
a wave in which the molecules vibrate in one direction and the wave of energy moves in another
sound
a wave that is produced by a vibrating object and travels through matter
what is the hammer
as the eardrum vibrates, it moves a tiny bone
explain how humans produce sound
by the cochlea
what is the cochlea
filled with liquid and lined with hundred of tiny hairs
what two types of waves are sound waves?
longitudinal and mechanical waves
compression
part of a longitudinal wave in which the molecules are sqeezed together
intensity
something loud
explain what 200 hertz means
that the vibration is 200 times the second has the frequency of 200 hertz
through which state of matter will a sound wave travel the fastest? why?
the fastest state of matter is a solid because the molecules are packed close together
pitch
the highness or lowness of a sound
through which state of matter will travel the slowest? Why
the state of matter that travels the slowest is gases because the molecules are spread out.
what is the eardrum
thin layer of skin that is stretched tightly over the end of the ear canal, much like the skin of the drum
decibel
used to measure the amplitude
what determines the pitch of a sound wave?
wavelength of its vibration
how can pitch of a sound wave be made higher? lower?
you can tell when the pitch of the sound wave is being made higher by the more wavelengths. you can tell when a sound wave is being made lower by the low wavelengths
explain how intense sounds can damage your hearing
130 decibels the sound will damage your ears.
