Audio Principles Flashcards
Which of the following defines the science or study of sound, how it’s created, its ability to travel within a space, and the way it’s managed?
Sound Propagation
Critical Listening
Acoustics
Rarefaction
Acoustics defines the science or study of sound, how it’s created, its ability to travel within a space, and the way it’s managed.
Which of the following represents a logarithmic ratio to measure the change in sound intensity or electric signals?
Decibel (dB)
Frequency
Acoustic Phase
Amplitude
The Decibel (dB) represents a logarithmic ratio to measure the change in sound intensity or electrical signals.
Which of the following has a ground wire, and carries analog signals as one hot wire and one cold wire in reverse polarity to cancel noise and interference?
Balanced cables
Twisted Polarity cables
Hot and Cold wires
Unbalanced cables
Balanced cables have a ground wire, and carry analog signals as one hot wire and one cold wire in reverse polarity to cancel noise and interference.
Which of the following connector is commonly used for twisted pair cabling that carries digital audio over the network?
HDMI
RJ-45
DisplayPort
S/PDIF
RJ-45 connectors are commonly used for twisted pair cabling that carries digital audio over the network.
Which of the following performs as a transducer, converting one form of energy to another, and is classified based on how it captures sound?
Ducker
Microphone
Preamp
Mixer
Microphones perform as a transducer, converting one form of energy to another, and are classified based on how they capture sound.
Which of the following is referred to as the safety zone that allows audio peaks to exceed the nominal level without clipping?
High Pass Filter
Noise Gate
Noise Ceiling
Headroom
Headroom is referred to as the safety zone that allows audio peaks to exceed the nominal level without clipping?
Which of the following is an example of dropping the sound levels for background music, to focus the audio on an important voice-over announcement?
Acoustic Echo Cancellation
Filtering
Delay
Ducking
Ducking is an example of dropping the sound levels for background music, to focus the audio on an important voice-over announcement.
Which of the following is the last link of the audio signal path?
Loudspeaker
Microphone
Amplifier
Digital Signal Processor
The last link of the audio signal path is the loudspeaker.
Which of the following is the average rate of speed at which sound travels through air, measured at sea level and 70F/20C degrees?
1128 feet/second (343 meters/second)
330 feet/second (100 meters/second)
20,000 feet/second (6096 meters/second)
5000 feet/second (1524 meters/second)
The average rate of speed at which sound travels through air is about 1128 feet/second (343 meters/second), measured at sea level and 70F/20C degrees.
The rate at which the sound vibrations repeat is called:
Frequency
Propagation
Wavelength
Rarefaction
The rate at which the sound vibrations repeat is called frequency.
Which of the following is related to the amount of energy that a sound wave carries?
Propagation
Reflection
Compression
Amplitude
The amplitude of a wave is related to the amount of energy it carries.
Which of the following is a low voltage level that comes out of a microphone when someone speaks into it?
Line Level
Headphone Level
Mic Level
Speaker Level
Mic level is a low voltage level that comes out of a microphone when someone speaks into it.
Which of the following has two conductor wires, one for the hot audio signal, and one for ground?
Hot and Cold wires
Fiber Optic cables
Unbalanced cables
Balanced cables
Unbalanced cables have two conductor wires, one for the hot audio signal, and one for ground.
Which of the following carries two independent channels for left and right audio, and creates the impression of sound heard from various directions?
Mono sound signals
Vinyl record
Stereo sound signals
Magnetic tape
Stereo sound signals carry two independent channels for left and right audio, and creates the impression of sound heard from various directions.
When a microphone signal first enters a mixer, which of the following is used to control the input level of the audio.
Filters
Delays
Duckers
Gain
When a microphone signal first enters a mixer, gain is used to control the input level of the audio.
