Munsell Written Final questions with
answers,.
This is a baffle that allows sound waves to exit from both sides of the driver to reproduce the final
sound. ANS -Dipole speaker system
Air is trapped inside of the enclosure that allows for a buildup of pressure behind the driver. This
trapped air acts like a spring to return the driver's cone to it's original resting state. ANS -Acoustic
Suspension
This enclosure has an opening to the outside that functions as a Helmholtz resonator. ANS -Ported
enclosure
Direct radiator drivers are highly efficient at transmitting sound, they can be up to 80% efficient. (T / F)
ANS -false
A ____ radiates it sound directly into the air with out the assistance of a horn, chamber, or duct ANS -
Direct Radiator Driver
Horns are used in conjunction with direct radiator drivers to... (3 ANSWERS) ANS -- reduce the midrange
spread of the driver
- increase the driver's efficiency
- control the dispersion of the sound
____ is the specification that will tell about the efficiency of a speaker. ANS -sensitivity
An active speaker system will have an amplifier, crossover, and protection built into it. (T / F) ANS -true
A speaker's polar plot will typically show... ANS -the vertical and horizontal dispersion of a speaker.
, Power compression is caused by two things:
1) The heating up of a driver's voice coil which causes the impedance of the speaker to increase.
2) As speakers are pushed harder they near their mechanical limits and they become non-linear. (T / F)
ANS -true
Drivers with large surface areas... ANS -are more efficient at reproducing lower frequency sounds
When a direct radiator driver's cone moves at different rates because it is not entirely rigid, it will
cause... ANS -cone breakup
When operating an amplifier in bridge mode... (2 ANSWERS) ANS -- both channels of the amplifier
operate together to double the output voltage
- you will hook up the (+) terminal of channel 1 and the (-) terminal of channel 2 to your speaker
A class B amplifier will more than likely never be used in live sound because... ANS -the amplifier creates
a crossover distortion.
It is generally agreed that most humans cannot hear Total Harmonic Distortion below 0.5% (T / F) ANS -
true
This amplifier type uses pulse wave modulation (PWM) to amplify signals. ANS -class D
The Amplifier's output wattage should be twice as high as the power handling capability of the
loudspeaker. (T / F) ANS -true
Dampening factor is only an issue for... ANS -your low frequency audio content.
When considering an Amplifier's signal to noise ratio, an engineer must take note of the weighting
system used to measure the noise. If a ______ is used, the midrange frequency content will be
emphasized more than any other weighting system. ANS -ITU-R-468
answers,.
This is a baffle that allows sound waves to exit from both sides of the driver to reproduce the final
sound. ANS -Dipole speaker system
Air is trapped inside of the enclosure that allows for a buildup of pressure behind the driver. This
trapped air acts like a spring to return the driver's cone to it's original resting state. ANS -Acoustic
Suspension
This enclosure has an opening to the outside that functions as a Helmholtz resonator. ANS -Ported
enclosure
Direct radiator drivers are highly efficient at transmitting sound, they can be up to 80% efficient. (T / F)
ANS -false
A ____ radiates it sound directly into the air with out the assistance of a horn, chamber, or duct ANS -
Direct Radiator Driver
Horns are used in conjunction with direct radiator drivers to... (3 ANSWERS) ANS -- reduce the midrange
spread of the driver
- increase the driver's efficiency
- control the dispersion of the sound
____ is the specification that will tell about the efficiency of a speaker. ANS -sensitivity
An active speaker system will have an amplifier, crossover, and protection built into it. (T / F) ANS -true
A speaker's polar plot will typically show... ANS -the vertical and horizontal dispersion of a speaker.
, Power compression is caused by two things:
1) The heating up of a driver's voice coil which causes the impedance of the speaker to increase.
2) As speakers are pushed harder they near their mechanical limits and they become non-linear. (T / F)
ANS -true
Drivers with large surface areas... ANS -are more efficient at reproducing lower frequency sounds
When a direct radiator driver's cone moves at different rates because it is not entirely rigid, it will
cause... ANS -cone breakup
When operating an amplifier in bridge mode... (2 ANSWERS) ANS -- both channels of the amplifier
operate together to double the output voltage
- you will hook up the (+) terminal of channel 1 and the (-) terminal of channel 2 to your speaker
A class B amplifier will more than likely never be used in live sound because... ANS -the amplifier creates
a crossover distortion.
It is generally agreed that most humans cannot hear Total Harmonic Distortion below 0.5% (T / F) ANS -
true
This amplifier type uses pulse wave modulation (PWM) to amplify signals. ANS -class D
The Amplifier's output wattage should be twice as high as the power handling capability of the
loudspeaker. (T / F) ANS -true
Dampening factor is only an issue for... ANS -your low frequency audio content.
When considering an Amplifier's signal to noise ratio, an engineer must take note of the weighting
system used to measure the noise. If a ______ is used, the midrange frequency content will be
emphasized more than any other weighting system. ANS -ITU-R-468
