lesson 1 Flashcards

1
Q

devices that change one or more aspects of an audio signal are called

A

signall processors

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2
Q

frequency response problems associated with cables are generally due to _________ between the ________ and shield in the cable.

A

capacitance

signal conductors

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3
Q

what are the main factors that affect a sound systems response outdoors

A

wind
temp
air absorption

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4
Q

what audio elements exhibit the flattest frequency response characteristics

A

electronic circuits and cables

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5
Q

what we hear as sound is a class of physical kinetic energy called___________

A

acoustical energy

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6
Q

sub-woofers are loudspeakers designed to operate below ___________

A

300HZ

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7
Q

what happens if two sound waves are 180 degrees out of phase

A

they cancel

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8
Q

define octave

A

the musical interval between two tones

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9
Q

define period of a wave

A

amount of time required for one complete cycle.

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10
Q

what does frequency response of a device describe

A

relationship between devices input and output

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11
Q

what does frequency response of a device describe

A

relationship between devices input and output

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12
Q

the frequency response of any sound system is affected by ________ in which it works

A

environment

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13
Q

what does pink noise sound like

A

rushing waterfall

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14
Q

wavelength is equal to

A

speed of sound/frequency

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15
Q

what is the main reason why phase must be controlled in a sound system

A

affects how sounds add together

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16
Q

what are the two basic classes of sound reinforcement loudspeakers

A

full range

limited range

17
Q

what are the main factors that will affect the frequency response indoors

A

reflections from wall,ceiling,floor… surfaces

18
Q

what is the speed which sound waves travel through air

A

1130 ft/second

19
Q

what is amplitude of an audio signal

A

signal level

20
Q

what is the purpose of shielding conductor of a cable where is it connected

A

catch most induced static

21
Q

the time relationship of a sound wave to a known time reference is called the

A

phase of the signal