Sound Waves + Ultrasound Flashcards
what type of waves are sound
longitudinal (p-waves)
what do sound waves travel as when vibrating
compression and rarefaction
how does sound travel in solid
the sound causes particles to vibrate and this action carries on
why does sound travel fastest in solid
the particles are closest to one another which sound needs to be transmitted
what happens to frequency of waves when travelling through different mediums
DOES NOT CHANGE
if frequency doesn’t change and speed has increased what does this mean for wavelength
it must be longer
v = f x wavelength
if frequency doesn’t change and speed has decreased what does this mean for wavelength
the waves get shorter
v = f x wavelength
what is the range of frequency people can hear from
20Hz to 20kHz
What frequency is ultrasound
above 20kHz
what do ultrasound waves do differently to other sound waves
partially reflect back at border between different media
