4.2 Flashcards
What is sound
Sound is produced when something vibrates, moving back and forth quickly
Vibrations create regions of space- air particles bunched together. What is is called?
Compressions
What are rarefactions
Also regions in which they spread out
What is a sound wave
Is the movement of alternating compressions and rarefactions
Sound waves travel towards the source of sound. True or false
False, they travel away from the source
Sound waves carry energy form 1 point to another.
True or false
True
Can sound travel through a vacuum
No, only through solids, liquids and gases
Energy that is carried through a wave horizontally although the particles move vertically is called what…
Transverse wave
What is a longitude wave
Is the particles in the wave make them move back and forth in the same direction as it is traveling
Does sound travel faster though solids or liquids
Solids
When hard surfaces hit a sound wave, this is called
Reflected sound but known as an echo
What is sonar
The time difference between sending an receiving sound waves
If you are in a room with many surfaces that don’t absorb sound, this is called…
Reverberation
Soft material eg curtains absorbs sound and turn it into cold air. Is this true
No, when sound is absorbed it turns the absorbed sound into heat
What is an oscilloscope (CRO)
Analysis different sounds and waves
