Chapter 1 Flashcards
(24 cards)
The ability to do work; measured in joules or newton-meter
Energy
Study of sound
Acoustics
Includes density and elasticity
Mass
How close molecules are
Density
Stiffness
Elasticity
rate/movement (meters/ second)
Velocity
how far an object moves in a given direction in a stated amount of time
Velocity
What are the 3 opposing forces that affect motion?
Friction, inertia, Elasticity
force that resists the movement of an object
Friction
a body at rest remains at rest and a body in motion remains in motion
Intertia
force related to springiness, the tendency of an object to snap back to its original shape
Elasticity
the random & three-dimensional motion of air molecules when there is no sound forcing them to vibrate
Brownian motion
Form of energy that needs a medium that has mass and stiffness; can be generated and transmitted in or through any medium
Sound
Areas in the wave where the air molecules are pushed close together and so at a slightly higher pressure
Compression
What happens to the air molecules as density increases?
Become closer together
Areas in the wave where the air molecules are further apart and so at a slightly lower pressure
Rarefaction
- the rate of sound vibration (1 compression + 1 rarefaction)
- how many times the speaker cone in and out in one second
- how many cycles occurred in one second
Frequency
What is the unit of frequency
cps or Hz
What happens to the pitch of sound as frequency increases?
Pitch is higher
What is the frequency of females, males, and children’s voices?
200 hz, 100 hz, 300 hz
What is the human frequency detection?
20 Hz to 20,000 Hz
The magnitude of vibration, which is related to loudness of sound
Intensity
What is the unit for intensity?
dB (decibels)
A graph to depict the threshold of each ear as a function of frequency and intensity
Audiogram
