Terms
The Who+What
Gear
Design
How Sound Works
100
When you make something louder, and shape the sound to match what the audience hears on stage.
What is Sound Reinforcement
100
This piece of gear can be though of as the "brain" of a sound system
What is a Mixer
100
Anything that moves air and creates a sound.
What is a Source
100
The FOH engineer should sit here in the house, about 2/3 of the way back
Where is the Middle
100
this equipment turns vibrating air into an electrical signal
What is a Microphone
200
The voice of an actor, or sound of a musical instrument are both considered this
What is a Source
200
The person responsible for making everything sound great at a live venue
Who is the Front-of-House Engineer
200
this type of mixer and other outboard gear were state-of-the art for decades and is still used in plenty of performances spaces. Has been replaced 
by Digital
What is Analog
200
sounds that are played to the audience during a production
What are playback
200
These are generated by the movements of air on our eardrums and interpreted by our brain as sound.
What are Nerve Signals
300
This instrument is an example of a source that can be plugged directly into a sound system
What is an Electric Keyboard
300
This piece of gear is worn by an actor and sends their audio signal to a different location wirelessly
What is a Transmitter
300
This type of mixer can control many things with the push of just one button.
What is a Digital Console
300
sounds that are needed to enhance the audience's understanding and enjoyment of a play
What are sound effects
300
Microphones that do not require external power, are rugged and can handle very loud environments at close range
What are Dynamic Mics
400
The actual name for a mic
cable connector/cable
What is 3-pin XLR
400
This piece of gear receives signal from a source wirelessly
What is a reciever
400
Processed signal is sent to this, before going to a speaker
What is an amplifier
400
Music that underscores or creates a mood in a production
What is Incidental Music
400
This microphone style requires power but can be very sensitive and capture very detailed audio. 
What are Condenser Microphones
500
The loud screech caused by a microphone 'hearing itself' from the speakers.
What is acoustical feedback
500
This piece of gear is on stage and is for the actor or musician to hear themselves or each other
What is a Monitor or Wedge
500
A processed and amplified signal is sent to this to make air move, which we interpret as sound.
What is a speaker
500
These speakers are placed to help people in the first few rows hear, who would otherwise not be covered by the spread of the main PA
What are Front-Fills
500
This microphone Pickup Pattern accepts sound from all directions without any rejection, but is more likely to pickup sound from speakers, which could lead to feedback
Omnidirectional
600
an undesired hum that starts low and gradually gets louder, often caused by an open mic in a loud environment
What is Mechanical Feedback
600
This person is the assistant to the FOH engineer and is often who helps mic actors or run playback
Audio Assistant or A2
600
using two different antennas and two different tuners inside a receiver to help ensure a clean signal at all times
What is a Diversity System
600
This Mac-only software has become the preferred and industry standard for playing cues in a production
What is Qlab
600
This is the vibration rate (measured in Hz, KHz) of a complete wave. It is how we measure "pitch" 
What is Frequency