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AAERT CER Exam Questions and Answers Fully Solved
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Exam of 8 pages for the course aaert at aaert (AAERT CER Exam)
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AAERT CER ExamMethods 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 - answerThe 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 - answerConsists 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? - answerNo. 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 - answerPhantom power source for condenser
microphones
Biggest difference between dynamic and condenser microphones - answerThe 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 - answerSet path in which a microphone will intercept sound
Cardioid pickup pattern - answerUnidirectional - 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 - answerIntercepts 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 - answerVery good for spoken word in a very controlled
environment. Not designed for long-range pickup or varying pickup patterns
Condenser Microphone - answerOffer more flexibility and lighter-weight products, but
comes with more responsibility on reporter for understanding how to adjust for different
environments.
Gooseneck Microphone - answerHas 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 - answerLay 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 - answerExtremely 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 in a courtroom environment
where attorneys tend to wander from place to place. Can be both wired and wireless.
These microphones require the use of batteries. Therefore, always have spare batteries
on hand.
Phone connectors - answer1/4" TS (Tip Sleeve) - 1/4" phone jack
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