Midterm Flashcards
Sound Engineers
FOH
Monitors
Assistant (AKA A2)
Volume Issues
Everyone is a sound operator
Different Tastes
Ownership = Opinion
Poor Acoustics
Volume Solutions:
Talk with Pastor and MD
Set a DB limit
Walk the room
Acoustical treatment
EQ the system to your room
Hearing Range
20 Hz to 20 kHz
Sine Wave
Basic wave with smooth rise and fall of the crest
Crest
Top of the wave form
(Compression portion of the wave)
Cycle
When a source has completed one crest and one trough
Wavelength
Distance between waves
Frequency
The number of times the wave occurs in one second.
Measured in Kilohertz,
Amplitude
Strength or intensity of a sound pressure wave “Height” of wave.
Phase
The way multiple sound waves interact in an acoustical or electrical space
How Phase interacts:
In phase - the waves add together
Inverse - they cancel each other out
Different waves -
Make a new wave
Speaker cable
Made of two identical wires
Line level cable
Instrument cable;
Two conductor design, surrounded by a braided wire shield.
Microphone cable
Three conductor design
Impedance
The resistance to the flow of an electrical current
High impedance is a guitar cable; less wires
Low impedance is a microphone cable, more wires.
Balanced/unbalanced
Instrument cables; unbalanced
Microphone and Speaker cables: balanced
XLR / Microphone cable sonic properties
The hot and cold wires take the sound and it becomes inversed, cancelling out all the noise (including picked up noise.)
Then it gets to the end and is flipped back so the sound comes out all nice and clean.
