Sound Flashcards
1
Q
How is sound produced?
A
Sound is produced by vibrating sources. Sound waves propagate by causing layers of air around it to displace.
2
Q
(Practical) Investigating sound in a vacuum:
A
- Place a bell and a striker into a sealed bell jar.
- Turn the bell on and turn the vacuum off (sound produce)
- Do the inverse (Sound stops)
3
Q
What is an echo?
A
Echoes are reflections of sound waves. They are formed when sounds are reflected off hard, flat surfaces