Sound Flashcards
How is sound made?
All sounds are created by vibrations which travel through a medium as a longitudinal sound wave. This causes our eardrum to vibrate so we can hear
Name some sources of vibration
Speaker or musical instrument
What is A longitudinal wave
In longitudinal waves , the vibrations are parallel to the direction of wave travel
What’s an Echo
Reflection of sound from a smooth hard surface
What is sonar
A short ping or pulse boats use
What is frequency
Number of vibrations per second
What is amplitude
“Loudness”
What is compression?
A region where air pressure is higher than normal
What is rarefaction?
A region where air pressure is lower than normal
Which way do particles vibrate?
They travel parallel so ⬅️➡️
What is a vacuum
A region of space containing no particles or atoms
Smooth definition
All sounds reflect back to the original place
Hard definition
Most sound is reflected and not absorbed
What happens when the amplitude increases
A sound gets louder
What happens when the amplitude increases
A sound gets louder
What happens in the screen of the CRO I’d the amplitude increases
The lines get taller
What way is frequency measured on a CRO
Horizontally
What way is amplitude measured on a CRO
Vertically
