AAERT CER Exam Complete
Questions with correct Answers
Methods of audio recording
Analog and digital
Microphone
Converts acoustical energy that is sound into electrical signal that can be delivered to either an analog
or digital device
Path of digital audio
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
Number of samples taken each second when recording sound. (44.1 kHz, 48 kHz, et cetera)
Bit rate
the number of bits transferred or received per unit of time (usually 16 or 24 bits)
Low sampling rate
Approximation
High sampling rate
Smooth
Digital mixer or A/D converter
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
(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
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?
, 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
Phantom power source for condenser microphones
Biggest difference between dynamic and condenser microphones
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
Set path in which a microphone will intercept sound
Cardioid pickup pattern
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
Intercepts sound from all directions from its placement, meaning it captures sound equally from all
directions. Beneficial for capturing multiple voices using only one microphone or when you have more
speakers than available recording channels. Use carefully to avoid noisy recordings or voices covering
one another if speaking simultaneously.
Dynamic Microphone
Very good for spoken word in a very controlled environment. Not designed for long-range pickup or
varying pickup patterns
Condenser Microphone
Offer more flexibility and lighter-weight products, but comes with more responsibility on reporter for
understanding how to adjust for different environments.
Gooseneck Microphone
Has a solid base which rests on a desk or table. From the base, a long flexible neck with a narrow
condenser microphone attached to the end extends out towards the speaker. Oftentimes has a
button that can toggle the microphone on and off to keep confidential conversations from appearing
on the record.
Low profile boundary Microphone
Lay flat on desk or table and are commonly no more than an inch or two thick. have a solid base
which rests on a desk or table. This type of mic tends to pick up a lot of ambient noise and parties
tend to place papers on top of them.
Lavalier Microphone
Extremely small condenser mic that attaches directly to the speaker. These mics are useful when the
environment does not offer an opportunity to place a microphone in front of a speaker. Also effective
Questions with correct Answers
Methods of audio recording
Analog and digital
Microphone
Converts acoustical energy that is sound into electrical signal that can be delivered to either an analog
or digital device
Path of digital audio
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
Number of samples taken each second when recording sound. (44.1 kHz, 48 kHz, et cetera)
Bit rate
the number of bits transferred or received per unit of time (usually 16 or 24 bits)
Low sampling rate
Approximation
High sampling rate
Smooth
Digital mixer or A/D converter
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
(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
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?
, 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
Phantom power source for condenser microphones
Biggest difference between dynamic and condenser microphones
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
Set path in which a microphone will intercept sound
Cardioid pickup pattern
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
Intercepts sound from all directions from its placement, meaning it captures sound equally from all
directions. Beneficial for capturing multiple voices using only one microphone or when you have more
speakers than available recording channels. Use carefully to avoid noisy recordings or voices covering
one another if speaking simultaneously.
Dynamic Microphone
Very good for spoken word in a very controlled environment. Not designed for long-range pickup or
varying pickup patterns
Condenser Microphone
Offer more flexibility and lighter-weight products, but comes with more responsibility on reporter for
understanding how to adjust for different environments.
Gooseneck Microphone
Has a solid base which rests on a desk or table. From the base, a long flexible neck with a narrow
condenser microphone attached to the end extends out towards the speaker. Oftentimes has a
button that can toggle the microphone on and off to keep confidential conversations from appearing
on the record.
Low profile boundary Microphone
Lay flat on desk or table and are commonly no more than an inch or two thick. have a solid base
which rests on a desk or table. This type of mic tends to pick up a lot of ambient noise and parties
tend to place papers on top of them.
Lavalier Microphone
Extremely small condenser mic that attaches directly to the speaker. These mics are useful when the
environment does not offer an opportunity to place a microphone in front of a speaker. Also effective
