# Acoustics

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The flashcards below were created by user amyg on FreezingBlue Flashcards.

1. To vibrate, a source must have 2 sounds, they are?
Mass and Elasticity
2. A medium must have two properties, they are?
Mass and elasticity
3. Sound needs...
A source to generate, and environment to travel, an applied force
4. T/F. Weight has gravity, mass doesnt.
True
5. One cycle is..
Equilibrium--> max disp. one way-->equilibrium-->max disp. another way-->equilibrium
6. T/F Inertia and mass are directly proportional
True. One goes up other goes up
7. Particles move about positions of equilibrium because of two opposing forces, they are?
Inertia and elasticity
8. Three Fundamental Physical Quantities are?
Length, mass and time
9. Vector quantity has....
Both magnitude and direction
10. Scalar quantity has...
only magnitude
11. T/F. Velocity can change without acceleration.
FALSE. It cannot.
12. T/F. Compliance and stiffness are indirectly proportional.
True.
13. Sustained vibratory motionhas two opposing forces, they are?
Inertia and gravity
14. KE is transformed to thermal energy because of..
Friction
15. Speed of sound for air?
16. T/F. A sine wave has more than one frequency.
False. It only has one
17. Five dimensions of the sine wave?
Amplitude, Frequency, Period, Phase, Wavelength
18. Total Impedance has 2 components, they are?
• Resistance (R)- friction, use up energy
• Reactance (X)- storage of energy
19. The Watt is..
Energy transferred per unit time
20. To convert from bels to decibels multiply by...
10
21. For every 10 fold chance in Ix, dB changes by?
10 dB
22. For every 2 fold change in Ix, dB changes by?
3dB

### Card Set Information

 Author: amyg ID: 135793 Filename: Acoustics Updated: 2012-02-16 18:25:10 Tags: Test Folders: Description: Test 1 Show Answers:

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