# Mechanical Waves And Sound

Subject : engineering
Instructions:
• Answer 35 questions in 15 minutes.
• If you are not ready to take this test, you can study here.
• Match each statement with the correct term.
• Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Any motion that repeats at regular time intervals

2. When two or more waves combine to produce a wave with a larger displacement

3. The time required for one cycle - a complete motion that returns to its starting point

4. The frequency of a sound as you perceive it

5. A disturbance in matter that carries energy from one place to another

6. Consists of the ear canal

7. The number of complete cycles in a given time

8. The bending of a wave as it enters a new medium at an angle

9. A wave in which the vibration of the medium is parallel to the direction the wave travels

10. When two or more waves overlap or combine together

11. An area where the particles in a medium are spaced close together

12. A wave that appears to stay in one place - it does not seem to move through the medium

13. Longitudinal waves - compressions and rarefactions that travel through a medium

14. A wave that travels along a surface separating two media (more than one medium)

15. A point where a crest or trough occurs midway between two nodes

16. The rate at which a wave's energy flows through a given area

17. The bending of a wave as it moves around an obstacle or passes through a narrow opening

18. The lowest point below the rest position

19. Wavelength x frequency

20. When two or more waves combine to produce a wave with a smaller displacement

21. Consists of the eardrum - hammer - anvil - & stirrup

22. Is the maximum displacement of the medium from its rest position on a wave

23. A physical response to the intensity of sound - modified by physical factors

24. When a wave bounces off a surface that it cannot pass through

25. An area where the particles in a medium are spread out

26. A technique used for determining the distance to an object underwater

27. The highest point of the wave above the rest position

28. The distance between a point on one wave and the same point on the next cycle of the wave

29. The response of a standing wave to another wave of the same frequency

30. A point on a standing wave that has no displacement from the rest position

31. A wave that causes the medium to vibrate at right angles to the direction in which the wave travels

32. A unit that compares the intensity of different sounds

33. A change in sound frequency caused by motion of the sound source - motion of the listener - or both

34. Consists of the cochlea and the auditory nerve

35. The material through which a wave travels through