week 4 Flashcards
(10 cards)
what type of wave is a sound wave
mechanical wave
what happens when something makes a sound
it vibrates
what do vibrations do
make the particles around it move back and forth. This movement passes the energy along, from one particle to the next
does sound need a medium to travel through
Yes, without a medium sound can’t travel
do electromagnetic waves need a medium to travel through
No
what happens when something vibrates
it passes the vibration into its surrounding environment, such as air
The vibration creates regions of space in which the air particles are bunched together and regions in which they are more spread out.
how do we hear sound
The pattern of bunched and spread-out air travels through the air and into your ears
what is the amplitude in a longitudinal wave
distance that an air particle is displaced from its rest position
how does frequency affect a sound wave
the higher the frequency the louder the pitch
how does amplitude affect a sound wave
the greater the amplitude the louder the sound
