Definition of Sound and Its Properties
Sound is a form of energy produced by these.
What are vibrations?
Before electronic amplification, what was the primary way to make live sound louder?
Using acoustically designed venues like amphitheaters.
What device is used to mix multiple audio signals into one output?
A mixing console.
What type of microphone is most sensitive and used for studio vocals?
Condenser microphone.
These tiny dots light up to form an image on a screen.
]What are pixels?
What property of sound determines pitch?
What is frequency?
What decade saw the widespread use of PA (Public Address) systems in live performances?
The 1920s
What type of microphone is commonly used for live performances due to its durability?
Dynamic microphone.
What live sound component helps prevent feedback by adjusting frequencies?
Equalizer.
This part of a pixel determines how bright it appears.
What is the electrical current?
This property of sound affects loudness.
What is amplitude?
Engineers________ Invent the First Transistor in 1947
What is Engineers at Bell Labs
What device boosts an audio signal from line level to speaker level?
An amplifier.
What is the primary advantage of digital mixing consoles over analog ones?
They allow for recallable presets and more precise sound control.
These are rows of pixels arranged horizontally.
What are scan lines?
Wavelength is the distance between two successive peaks or troughs of this.
What is a sound wave?
What was one of the first major concerts to use large-scale electric amplification?
The Beatles' 1965 Shea Stadium concert.
What type of speakers require an external power amplifier to function?
Passive speakers.
What device allows multiple speakers and monitor mixes in live sound systems?
An auxiliary send (Aux Send).
In early TVs, this device shot electrons at the screen.
What is the electron gun?
Humans can typically hear frequencies ranging from this to this.
What is 20 Hz to 20,000 Hz?
What is the name of the company that introduced the first professional PA systems for concerts in the 1960s?
JBL (James B. Lansing Sound, Inc.).
What innovation in the 1990s replaced ground stack speakers at concerts?
Line array speakers.
What major 1990s innovation improved clarity in large concert sound systems?
The introduction of line array speaker technology.
This modern display method energizes pixels directly with electric current.
What is a flat-panel screen?