Sound Flashcards
define ultrasound
it is the name given to frequencies above or greater than 20000Hz or 20kHz
define a compression
it is a region of high pressure due to particles being close together
define rarefaction
it is a region of low pressure due to particles being far apart
what is the range of frequencies a human can hear
20Hz-20000Hz
what type of waves are sound waves
longitudinal
sound waves…..
require a medium to travel through; if there are no molecules for example in a vacuum the sound can’t travel
define echo
the reflection of a sound wave is an echo
what is the loudness of a sound
the waves amplitude; greater amplitude= louder sound
what is the pitch of a sound related to
the waves frequency; greater frequency = higher pitch
which state of matter does sound travel fastest in
solid
which state of matter does sound travel slowest in
gas
state the speed of sound in a: gas, liquid and solid
gas- 350m/s
liquid- 1500m/s
solid-5000m/s
