Term
WHAT ARE THE 3 PRIMARY FACTORS DETERMINING POWER LOSS IN
SPEAKER CABLE RUNS? |
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Definition
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NAME 3 ELEMENTS THAT HAVE THE GREATEST EFFECT ON SYSTEM DESIGN? |
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Definition
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Term
NAME 3 TYPES OF SPEECH INTELIGIBILITY MEASUREMENTS? |
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Definition
- %ALcons- Articulation Loss of Consonants
- Speech Transmission Index
- Clarity Ratio-Energy Time Curve
- C50-Speech
- C80-Concert
- Initial Time Delay Gap
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Term
WHAT IS THE NAME USED TO DECRIBE UNITS OF ABSORBTION? |
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Definition
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Term
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Definition
| Point where direct sound equals reverberant sound |
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Term
| HOW DOES A TEMPERATURE LAPSE AFFECT SOUND? |
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Definition
Sound bends toward the colder air.
The sound ray paths to curve upward.
During the day, the air temperature is warm close to the ground . This temperature decreases as you increase height. The sound bends toward the sky. |
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Term
| HOW DOES A TEMPERATURE INVERSION AFFECT SOUND? |
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Definition
Sound bends toward the colder air.
The sound loses the high velocity so you lose sound in you speaker because sound travels slower in cold weather.
During the night. The air temperature is lower closest to the ground and increase with height. The sound bends toward the ground. |
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Term
| WHAT IS PURPOSE OF “A WEIGHTING” ON AN SPL METER? |
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Definition
Noise measurements, rolls off low frequencies fairly steeply, and also rolls off high frequencies, quiet sounds and for pure tones.
This contour is designed to approximate the ear at the 40phon level. This weighting is used to measure ambient sound levels. |
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Term
| WHAT IS PURPOSE OF “C WEIGHTING” ON AN SPL METER? |
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Definition
rolls off low and high frequencies slightly, think of this a a "music" filter
This contour approximates the ear’s response at very high sound levels.
Often used to measure traffic noise. |
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Term
| WHAT IS THE RECOMMENDED SPL METER WEIGHTING? WHY? |
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Definition
A Weighted slow correlates with most standard exposure limitation charts.
A Weighted slow is also recommended because it focuses attention on the frequencies that sound the loudest and are vital for communication. |
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Term
NAME SOME COMMONLY USED SPEAKER CABLE CONNECTORS USED BY
PROFESSIONAL SOUND COMPANIES (MANUFACTURER AND MODEL). |
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Definition
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Term
[image]
USING A STANDARD WIRE TABLE WE DETERMINE THAT FOR EACH 300METERS/1000FT OF 10 GAUGE WIRE, WE HAVE IΩ OF RESISTANCE.
HOW MUCH RESISTANCE WOULD AN 80METER RUN OF SPEAKER CABLE HAVE?
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Definition
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Term
| WHAT DOES THE 5% RULE STATE? |
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Definition
CABLE RESISTANCE SHOULD NEVER EXCEED 5% OF LOAD RESISTANCE.
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Term
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Definition
A numerical indication of how well an amplifier can “control” a loudspeaker’s cone motion
Damping factor is defined as the ratio between the amplifier’s output impedance and the loudspeaker’s rated impedance.
Damping factor is more important at low frequencies (since LF cones have greater travel).
The resistance of loudspeaker cables can have an adverse affect upon damping factor. FOLLOW THE 5% RULE! |
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