Methods of audio recording - Answer Analog and digital
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 wil...
AAERT CER Revision Exam Questions
Answered Correctly.
Methods of audio recording - Answer Analog and digital
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 - Answer 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 - Answer Very good for spoken word in a very controlled environment. Not
designed for long-range pickup or varying pickup patterns
Condenser Microphone - Answer Offer more flexibility and lighter-weight products, but comes with
more responsibility on reporter for understanding how to adjust for different environments.
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