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To vibrate, a source must have 2 sounds, they are?
Mass and Elasticity
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A medium must have two properties, they are?
Mass and elasticity
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Sound needs...
A source to generate, and environment to travel, an applied force
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T/F. Weight has gravity, mass doesnt.
True
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One cycle is..
Equilibrium--> max disp. one way-->equilibrium-->max disp. another way-->equilibrium
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T/F Inertia and mass are directly proportional
True. One goes up other goes up
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Particles move about positions of equilibrium because of two opposing forces, they are?
Inertia and elasticity
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Three Fundamental Physical Quantities are?
Length, mass and time
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Vector quantity has....
Both magnitude and direction
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Scalar quantity has...
only magnitude
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T/F. Velocity can change without acceleration.
FALSE. It cannot.
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T/F. Compliance and stiffness are indirectly proportional.
True.
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Sustained vibratory motionhas two opposing forces, they are?
Inertia and gravity
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KE is transformed to thermal energy because of..
Friction
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Speed of sound for air?
About 330 m/s
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T/F. A sine wave has more than one frequency.
False. It only has one
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Five dimensions of the sine wave?
Amplitude, Frequency, Period, Phase, Wavelength
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Total Impedance has 2 components, they are?
- Resistance (R)- friction, use up energy
- Reactance (X)- storage of energy
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The Watt is..
Energy transferred per unit time
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To convert from bels to decibels multiply by...
10
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For every 10 fold chance in Ix, dB changes by?
10 dB
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For every 2 fold change in Ix, dB changes by?
3dB
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