AAERT Final Paper Questions with Correct Answers (Grade A+)
Question 1: microphone
Answer: converts the acoustical energy that is sound into an electrical signal that can be delivered to either
an analog or a digital device
Question 2: analog and digital
Answer: recordings start the same way; with sound
Question 3: digital mixer or A/D converter
Answer: to change the analog signal to a digital signal it will need to pass through an analog to digital
converter, commonly referred to as a
Question 4: sample rate (44.1 khz, 48 khz,etc.) bit rate (usually 16 or 24 bits)
Answer: the two most important factors in the quality of the new digital audio are
Question 5: low sampling rate
Answer: approximation
Question 6: high sampling rate
Answer: smooth
Question 7: the bit rate
Answer: represents the amount of information, or detail that is stored per unit of time of a recording
Question 8: digital court reporting programs
Answer: sample at a rate fast enough, thousands of times a second, so speech sounds are smooth and
correctly represented
Question 9: when selecting the microphones that you will use there are several variables: these
variables include
Answer: Microphone type (dynamic or condenser) microphone pick-up pattern microphone size and stands
microphone cost
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, Question 10: for the purpose of digital reporting, AAERT recommends that you slect
Answer: dynamic, condenser, or a combination of dynamic and condenser microphones. Both of these
microphone types work in a unique way but can generate a high quality audio reproduction
Question 11: dynamic microphones
Answer: (also called "moving coil" microphones) are made up of a diaphragm, a coil, and a magnet. As
acoustical energy hits against the diaphragm, which is a flat plate at the front of the microphone, it causes
the coil that is attached to it to move back and forth over top of the magnet . they are bulky
Question 12: condenser microphone
Answer: consists of a front plate (diaphragm), back plate, and a 48 volt power source. The front and back
plate together create a capacitor. wider assortment of shapes and sizes. one type commonly used is a
gooseneck microphone
Question 13: when acoustical energy hits the front plate of the capacitor, the distance between the front
and back plate changes. the gap between these two plates is electrically charged. this charge is created
by either an internal battery source or an external power source referred to as ..
Answer: phantom power
Question 14: aaert does not recommend:
Answer: the use of batteries as the supply of this charge. if a battery would die during use, you could have a
gap in your recording and you would need to interrupt the event you are reporting to fix this problem
Question 15: most digital mixers and A/D converters
Answer: act as a phantom power supply source. the changes in electrical energy between these two plates
will travel through the wires of the microphone and eventually reach your digital mixer or A/D converter.
essentially the biggest difference between these microphone types is the way by which acoustical energy is
transformed into electrical energy: one assisted by an electrical source and the other by a magnet. both are
capable of facilitating a quality audio recording and are recommended for use in the field of digital
reporting
Question 16: is the set path in which a microphone will intercept sound
Answer: pick-up pattern
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Question 1: microphone
Answer: converts the acoustical energy that is sound into an electrical signal that can be delivered to either
an analog or a digital device
Question 2: analog and digital
Answer: recordings start the same way; with sound
Question 3: digital mixer or A/D converter
Answer: to change the analog signal to a digital signal it will need to pass through an analog to digital
converter, commonly referred to as a
Question 4: sample rate (44.1 khz, 48 khz,etc.) bit rate (usually 16 or 24 bits)
Answer: the two most important factors in the quality of the new digital audio are
Question 5: low sampling rate
Answer: approximation
Question 6: high sampling rate
Answer: smooth
Question 7: the bit rate
Answer: represents the amount of information, or detail that is stored per unit of time of a recording
Question 8: digital court reporting programs
Answer: sample at a rate fast enough, thousands of times a second, so speech sounds are smooth and
correctly represented
Question 9: when selecting the microphones that you will use there are several variables: these
variables include
Answer: Microphone type (dynamic or condenser) microphone pick-up pattern microphone size and stands
microphone cost
Page 1
, Question 10: for the purpose of digital reporting, AAERT recommends that you slect
Answer: dynamic, condenser, or a combination of dynamic and condenser microphones. Both of these
microphone types work in a unique way but can generate a high quality audio reproduction
Question 11: dynamic microphones
Answer: (also called "moving coil" microphones) are made up of a diaphragm, a coil, and a magnet. As
acoustical energy hits against the diaphragm, which is a flat plate at the front of the microphone, it causes
the coil that is attached to it to move back and forth over top of the magnet . they are bulky
Question 12: condenser microphone
Answer: consists of a front plate (diaphragm), back plate, and a 48 volt power source. The front and back
plate together create a capacitor. wider assortment of shapes and sizes. one type commonly used is a
gooseneck microphone
Question 13: when acoustical energy hits the front plate of the capacitor, the distance between the front
and back plate changes. the gap between these two plates is electrically charged. this charge is created
by either an internal battery source or an external power source referred to as ..
Answer: phantom power
Question 14: aaert does not recommend:
Answer: the use of batteries as the supply of this charge. if a battery would die during use, you could have a
gap in your recording and you would need to interrupt the event you are reporting to fix this problem
Question 15: most digital mixers and A/D converters
Answer: act as a phantom power supply source. the changes in electrical energy between these two plates
will travel through the wires of the microphone and eventually reach your digital mixer or A/D converter.
essentially the biggest difference between these microphone types is the way by which acoustical energy is
transformed into electrical energy: one assisted by an electrical source and the other by a magnet. both are
capable of facilitating a quality audio recording and are recommended for use in the field of digital
reporting
Question 16: is the set path in which a microphone will intercept sound
Answer: pick-up pattern
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