Sound physics Flashcards
1
Q
How is sound produced?
A
Vibrating particles
2
Q
What is the human hearing range?
A
20hertz-20,000hertz
3
Q
If you listen to your music on a loud noise for a long time, what would happen? List 2 reasons
A
1) Become deaf
2) Become partially deaf
4
Q
How does sonar allow fishermen there shoal or fish?
A
Sonar is sent down to the shoal or fish and it reflects off and then the fishermen are able to work out the distance by how long it takes for the echo to come back
5
Q
Name 2 items which work by absorbing sound waves
A
1) Ear plugs
2) Ear defenders
