Acoustics Study Guide Exam
1. Amplitude of displacement is proportional to the
.: magnitude of force applied
2. Vibratory Motion of a Tuning Fork
The fork was displaced by application of an external force, and the magnitude of displacement was proportional
to the force applied. Next, we saw that
the restoring force of caused thetines to return towards
equilibrium, and an caused the tines to move
through equilibrium toward maximal displacement in the opposite di- rection.: elasticity ; inertial force
3. Vibratory motion consists of back and forth movement of a body that as
and .: mass and elasticity
4. The back and forth motion occurs as the result of two opposing forces:
and .: inertial force and
elastic restoring force
5. What is Newton's first law dealing with?: Inertia
6. With every force there must be associated an equal reaction force of oppo- site direction.: Newton's third law
7. Once the original force is applied and sends the object into movement, the movement is sustained by the force
of , and the movement continues in that direction until the was
overcome by the .: inertia ; inertial force ; eleastic restoring force
8. serves as the "reactionary force" to inertia.: -
Elasticity
9. Two critical properties of both the source of sound and the medium that transmits it.: mass and elasticity
10.: rarefaction
11.: compression
12.Ocsillating particles in the are not displaced over an
appreciable distance.
Whereas,
consists of alternating regions of high and low densities moving through
the medium away from the source.: medium ; wave propagation
13.What are the derived quantities of interest in acoustics?: displacement (x)
, Acoustics Study Guide Exam
velocity (c or v)
acceleration (a) force
(F)
pressure (p)
14.Quantities that are specified by both magnitude and direction are called
.: vectors
15.Quantities such as are only specified by refer- ence to
they have no direction associated with them. They are called .: mass, time, and energy ; magnitude;
scalars
16. corresponds to velocity when direction is not considered, only
.: Speed ; magnitude
17.Formula of speed.: distance/time
18.What does a sound need?: A sound source, something that initially vibrates (i.e. guitar strings) and a medium
(transmits the sound).
19.What are two wave requirements?: elastic source and an elastic medium
20.Air is the .
One molecule of air is a .: medium ; particle
21.How are wave types classified?: The direction of vibration of the particle COMPARED to the direction of
wave propagation
22.What is a spring-mass system?: An example of simple harmonic motion.
23.What is a non-repeating wave shape?: Impulse or aperiodic
24.What are two types of oscillatory wave shape?: sinusoidal (simple) and non-sinusoidal (complex)
25.What is wave velocity?: speed at which the wave travels through the medium
; speed of wave propagation
26.What is particle velocity?: speed of particle movement
27.All bodies remain at rest or in a state of uniform motion unless another force acts in opposition.: Newtons
first law of motion: inertia
28.What is magnitude?: How far I have gone.
29.How is magnitude of inertia related to the mass?: directly proportional
30.The opposition of two forces is consistent with
.: Newton's third law
31.What is Newton's third law?: For every action there is an equal and opposite reaction force.
, Acoustics Study Guide Exam
32.What is the restoring force to inertia?: elasticity
33.T/F: Force and restoring force can happen simultaneously.: False.
34. The period of a vibrating object is: The time a vibrating body takes to complete one cycle.
35.How is period measured?: Measured in units of time, usually in seconds
36.How are period and frequency related?: Period and frequency are inversely related:
»That is, f = 1/T and T = 1/f
37.What is frequency?: number of cycles per second or rate at which a sinusoid repeats itself.
38.What is the definition of speed of sound?: The rate at which a disturbance is propagated through the medium.
39.How is propagation speed of the wave determined?: The elasticity and density of the transmitting
medium determine propagation speed.
40. What is the definition of wavelength?: Distance traveled by a sine wave during one period of vibration
(particle completes the one cycle of vibration).
41.What unit is wavelength measured in?: distance units
42.What is the formula for distance?: velocity x time
43.What is the formula for calculating wavelength?: wave velocity*period
44.How is frequency measured?: hertz
45.Velocity is the time-rate of .: displacement
46. is the time-rate change of velocity. That is in- creasing or
decreasing velocity over time.: acceleration
47.Is acceleration a scalar quantity or a vector?: vector
48.What is the equation for acceleration?: Acceleration = change in velocity / time taken
49.What is Newton's second law?: Force = mass x acceleration
50.A force is required to accelerate an object because the object has
, and the object therefore, has .: mass ; in- ertia
51.What are the two consequences of applying force?: 1. Cause matter to distort.
2. Causes acceleration of matter.
52.Is force a vector or a scalar?: vector
53.The stiffer an object is the greater the force that is required to compress or stretch the object some given
distance. So therefore, what is the realtionship between stiffness and force?: proportionally related
54.How is inertial force
F(i) and elastic restoring force (Fr) related to displacement and equilibrium?-
1. Amplitude of displacement is proportional to the
.: magnitude of force applied
2. Vibratory Motion of a Tuning Fork
The fork was displaced by application of an external force, and the magnitude of displacement was proportional
to the force applied. Next, we saw that
the restoring force of caused thetines to return towards
equilibrium, and an caused the tines to move
through equilibrium toward maximal displacement in the opposite di- rection.: elasticity ; inertial force
3. Vibratory motion consists of back and forth movement of a body that as
and .: mass and elasticity
4. The back and forth motion occurs as the result of two opposing forces:
and .: inertial force and
elastic restoring force
5. What is Newton's first law dealing with?: Inertia
6. With every force there must be associated an equal reaction force of oppo- site direction.: Newton's third law
7. Once the original force is applied and sends the object into movement, the movement is sustained by the force
of , and the movement continues in that direction until the was
overcome by the .: inertia ; inertial force ; eleastic restoring force
8. serves as the "reactionary force" to inertia.: -
Elasticity
9. Two critical properties of both the source of sound and the medium that transmits it.: mass and elasticity
10.: rarefaction
11.: compression
12.Ocsillating particles in the are not displaced over an
appreciable distance.
Whereas,
consists of alternating regions of high and low densities moving through
the medium away from the source.: medium ; wave propagation
13.What are the derived quantities of interest in acoustics?: displacement (x)
, Acoustics Study Guide Exam
velocity (c or v)
acceleration (a) force
(F)
pressure (p)
14.Quantities that are specified by both magnitude and direction are called
.: vectors
15.Quantities such as are only specified by refer- ence to
they have no direction associated with them. They are called .: mass, time, and energy ; magnitude;
scalars
16. corresponds to velocity when direction is not considered, only
.: Speed ; magnitude
17.Formula of speed.: distance/time
18.What does a sound need?: A sound source, something that initially vibrates (i.e. guitar strings) and a medium
(transmits the sound).
19.What are two wave requirements?: elastic source and an elastic medium
20.Air is the .
One molecule of air is a .: medium ; particle
21.How are wave types classified?: The direction of vibration of the particle COMPARED to the direction of
wave propagation
22.What is a spring-mass system?: An example of simple harmonic motion.
23.What is a non-repeating wave shape?: Impulse or aperiodic
24.What are two types of oscillatory wave shape?: sinusoidal (simple) and non-sinusoidal (complex)
25.What is wave velocity?: speed at which the wave travels through the medium
; speed of wave propagation
26.What is particle velocity?: speed of particle movement
27.All bodies remain at rest or in a state of uniform motion unless another force acts in opposition.: Newtons
first law of motion: inertia
28.What is magnitude?: How far I have gone.
29.How is magnitude of inertia related to the mass?: directly proportional
30.The opposition of two forces is consistent with
.: Newton's third law
31.What is Newton's third law?: For every action there is an equal and opposite reaction force.
, Acoustics Study Guide Exam
32.What is the restoring force to inertia?: elasticity
33.T/F: Force and restoring force can happen simultaneously.: False.
34. The period of a vibrating object is: The time a vibrating body takes to complete one cycle.
35.How is period measured?: Measured in units of time, usually in seconds
36.How are period and frequency related?: Period and frequency are inversely related:
»That is, f = 1/T and T = 1/f
37.What is frequency?: number of cycles per second or rate at which a sinusoid repeats itself.
38.What is the definition of speed of sound?: The rate at which a disturbance is propagated through the medium.
39.How is propagation speed of the wave determined?: The elasticity and density of the transmitting
medium determine propagation speed.
40. What is the definition of wavelength?: Distance traveled by a sine wave during one period of vibration
(particle completes the one cycle of vibration).
41.What unit is wavelength measured in?: distance units
42.What is the formula for distance?: velocity x time
43.What is the formula for calculating wavelength?: wave velocity*period
44.How is frequency measured?: hertz
45.Velocity is the time-rate of .: displacement
46. is the time-rate change of velocity. That is in- creasing or
decreasing velocity over time.: acceleration
47.Is acceleration a scalar quantity or a vector?: vector
48.What is the equation for acceleration?: Acceleration = change in velocity / time taken
49.What is Newton's second law?: Force = mass x acceleration
50.A force is required to accelerate an object because the object has
, and the object therefore, has .: mass ; in- ertia
51.What are the two consequences of applying force?: 1. Cause matter to distort.
2. Causes acceleration of matter.
52.Is force a vector or a scalar?: vector
53.The stiffer an object is the greater the force that is required to compress or stretch the object some given
distance. So therefore, what is the realtionship between stiffness and force?: proportionally related
54.How is inertial force
F(i) and elastic restoring force (Fr) related to displacement and equilibrium?-
