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Greenberg Notes 3 (AT2)
Audio Tech 2
37
Music
Undergraduate 1
04/26/2012

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Cards

Term
Describe a what a crossover does.
Definition
It divides frequencies into regions. It's what tells the highs to go to the tweeter and lows to go to the woofer.
Term
What is a turnover frequency?
Definition
The frequency selected on a shelving equalizer.
Term
Define amplitude in acoustics and psychoacoustics.
Definition
Acoustics: How big or tall a sound wave is.
Psychoacoustic: How loud or soft humans perceive a sound.
Term
What is dynamic range?
Definition
The volume or signal level between minimum and maximum.
Term
Psychoacoustic processors could be a spectrum processor.
Definition
'Course.
Term
Define clipping.
Definition
Overload distortion.
Term
What is the sound frequency spectrum?
Definition
The range of frequencies from 20 Hz - 20 kHz.
Term
What are the two elements of audio?
Definition
Amplitude & Frequency.
Term
What is the intensity of a sound wave measured in?
Definition
DBSPL.
Term
What is the power of an audio signal measured in?
Definition
DBM/DBU
Term
What is voltage in dB measured in?
Definition
DBV.
Term
What is VU?
Definition
Volume Units. It shows the average signal level.
Term
What is PPM?
Definition
Peak Program Meter. It shows the exact signal level.
Term
What do humans perceive, VU or PPM?
Definition
Humans perceive VU, average volume level.
Term
What is headroom?
Definition
The range between 0 VU and clipping. It allows for a signal to peak in without clipping.
Term
In studio B, 0 VU = -14.
Definition
Idk.
Term
Everything electric doesn't make noise.
Definition
Lies!
Term
What is noise floor?
Definition
How much ambient noise in an acoustical space (acoustic or electrical phenomenon).
Term
Describe transmission loss.
Definition
The reduction of DBSPL of a source sound as it passes through an acoustic barrier.
Term
Describe the two ways acoustic isolations works.
Definition
Sound that occurs outside of a room stays outside and doesn't leak in. Sound that occurs within a room stays inside and doesn't leak out.
Term
What are the dynamic ranges of medias?
Definition
AM: 30 dB
FM: 50 dB
Magnetic Tape: 60 dB
CD: 90 dB
Term
What do compressors do?
Definition
They make soft sounds louder and loud sounds softer.
Term
What do limiters do?
Definition
They allow for sounds to get only so loud.
Term
What is the dynamic range of human hearing?
Definition
0 - 140 dB
Term
What is threshold control?
Definition
The user set level that tells the processor when to work. If a signal doesn't pass the threshold, it won't activate.
Term
What is a parameter?
Definition
Anything one can change.
Term
What is ratio control?
Definition
It's what controls the strength of the processor once the signal passes the threshold.
Term
Describe what a gate does.
Definition
It allows the loudest amplitude to be heard.
Term
What is a plugin?
Definition
A virtual signal processor.
Term
What is a ducker?
Definition
Something that externally triggers a threshold?
Term
What is sibilance? What are its frequencies?
Definition
S's, Ch's, and Z's. 5k - 9kHz
Term
Define stereo buss output.
Definition
The combination of all channels that signal goes through.
Term
Define the control room level.
Definition
A copy of the signal output that's played through the speakers.
Term
What causes sound?
Definition
Vibrational disturbance.
Term
What is jitter?
Definition
A time-based error.
Term
What's an aux return?
Definition
A line insert where effects return to the console which does not take up a channel.
Term
Explain ground hum.
Definition
Electricity stuck in a circuit trying to find its way to the ground.
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