Sound waves Flashcards
What are sound waves caused by
Vibrating objects
What type of waves is a sound wave
Longitudinal
How do sound waves work
The mechanical vibrations are passed through the surrounding medium as a series of compressions
What state does sound travel faster in
Solids
What state does sound travel slowest in
Gases
Why can’t sound travel in space
It’s mostly a vacuum
What will sound waves be reflected by
Hard, flat surfaces
Why does sound sound different in an empty room to a one with furniture in it
The furniture absorbs sound quickly and stops it echoing around the room
What are echoes
Reflected sound waves
Why do you hear a delay between the original sound and the echo
Because the echo has to travel further
What happens to sound waves as they enter denser material
They speed up
The higher the frequency,the higher the…
Pitch
What type of pitch do high frequencies make
High
What type of pitch do low frequencies make
Low
What is frequency in sound waves
The number of complete vibrations each second
