AAERT CER UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
◉ Microphone
Answer: Converts acoustical energy that is sound into electrical
signal that can be delivered to either an analog or digital device
◉ Path of digital audio
Answer: To change the analog signal to a digital signal it will need
to pass through an analog to digital
converter (digital mixer or A/D converter)
◉ Sample rate
Answer: Number of samples taken each second when recording
sound. (44.1 kHz, 48 kHz, et cetera)
◉ Bit rate
Answer: the number of bits transferred or received per unit of
time (usually 16 or 24 bits)
◉ Low sampling rate
Answer: Approximation
,◉ High sampling rate
Answer: Smooth
◉ Digital mixer or A/D converter
Answer: The digital mixer, or A/D converter, will output the signal
through one of a variety of connections such as USB, FireWire
(IEEE 1394), serial, local computer bus, or Ethernet.
◉ Dynamic Microphone
Answer: (Moving coil) - made up of 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 the top of the magnet.
The movement of the coil over top of the magnet creates an
electrical signal which travels through the wires within the
microphone and eventually reaches your digital mixer or A/D
converter.
◉ 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. 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 phantom power.
, ◉ Should you use microphones with batteries?
Answer: No. 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.
◉ Digital mixers and A/D converters act as
Answer: Phantom power source for condenser microphones
◉ Biggest difference between dynamic and condenser
microphones
Answer: 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.
◉ Pickup pattern
Answer: Set path in which a microphone will intercept sound
◉ Cardioid pickup pattern
Answer: Unidirectional - heart-shaped pattern which reaches out
from the diaphragm of a microphone. Beneficial for single voice
located in front of mic while rejecting additional ambient room
sound from behind the mic and lower sensitivity on the sides
◉ Omnidirectional pickup pattern
QUESTIONS AND CORRECT ANSWERS
◉ Microphone
Answer: Converts acoustical energy that is sound into electrical
signal that can be delivered to either an analog or digital device
◉ Path of digital audio
Answer: To change the analog signal to a digital signal it will need
to pass through an analog to digital
converter (digital mixer or A/D converter)
◉ Sample rate
Answer: Number of samples taken each second when recording
sound. (44.1 kHz, 48 kHz, et cetera)
◉ Bit rate
Answer: the number of bits transferred or received per unit of
time (usually 16 or 24 bits)
◉ Low sampling rate
Answer: Approximation
,◉ High sampling rate
Answer: Smooth
◉ Digital mixer or A/D converter
Answer: The digital mixer, or A/D converter, will output the signal
through one of a variety of connections such as USB, FireWire
(IEEE 1394), serial, local computer bus, or Ethernet.
◉ Dynamic Microphone
Answer: (Moving coil) - made up of 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 the top of the magnet.
The movement of the coil over top of the magnet creates an
electrical signal which travels through the wires within the
microphone and eventually reaches your digital mixer or A/D
converter.
◉ 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. 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 phantom power.
, ◉ Should you use microphones with batteries?
Answer: No. 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.
◉ Digital mixers and A/D converters act as
Answer: Phantom power source for condenser microphones
◉ Biggest difference between dynamic and condenser
microphones
Answer: 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.
◉ Pickup pattern
Answer: Set path in which a microphone will intercept sound
◉ Cardioid pickup pattern
Answer: Unidirectional - heart-shaped pattern which reaches out
from the diaphragm of a microphone. Beneficial for single voice
located in front of mic while rejecting additional ambient room
sound from behind the mic and lower sensitivity on the sides
◉ Omnidirectional pickup pattern
