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Low Voltage Year 3 - Test 5 > lesson 1 > Flashcards

Flashcards in lesson 1 Deck (21):
1

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

signall processors

2

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

capacitance
signal conductors

3

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

wind
temp
air absorption

4

what audio elements exhibit the flattest frequency response characteristics

electronic circuits and cables

5

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

acoustical energy

6

sub-woofers are loudspeakers designed to operate below ___________

300HZ

7

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

they cancel

8

define octave

the musical interval between two tones

9

define period of a wave

amount of time required for one complete cycle.

10

what does frequency response of a device describe

relationship between devices input and output

11

what does frequency response of a device describe

relationship between devices input and output

12

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

environment

13

what does pink noise sound like

rushing waterfall

14

wavelength is equal to

speed of sound/frequency

15

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

affects how sounds add together

16

what are the two basic classes of sound reinforcement loudspeakers

full range
limited range

17

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

reflections from wall,ceiling,floor... surfaces

18

what is the speed which sound waves travel through air

1130 ft/second

19

what is amplitude of an audio signal

signal level

20

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

catch most induced static

21

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

phase of the signal