Final Exam

Question 1

An energized speaker cone moving outwards is said to be what?

Answer 1

Making a compression wave

Question 2

An energized speaker cone moving inwards is said to be what?

Answer 2

Generating an expansion wave

Question 3

A speaker cone that has moved out, moved in and returned back to its starting point is said to have what?

Answer 3

Completed one cycle

Question 4

The rate at which any kind of motion repeats itself is known as its what?

Answer 4

Frequency

Question 5

When a motion repeats itself its measured in what?

Answer 5

Cycles per second

Question 6

A sound with low frequency is heard as a what?

Answer 6

Sound with low pitch

Question 7

3500 cycles per second

Answer 7

3.5kHz

Question 8

What is the frequency response of the normal human ear?

Answer 8

20Hz - 20kHz

Question 9

What is the speed of sound traveling through air?

Answer 9

1130 ft/s

Question 10

Human hearing has a normal range of what?

Answer 10

Ten octaves

Question 11

What frequency range represents an octave?

Answer 11

250Hz - 500Hz

Question 12

What decibel level has OSHA established as enough to cause lasting hearing damage?

Answer 12

125dB

Question 13

What is responsible for our ability to hear in stereo?

Answer 13

Audio processing that works in millionths of a second

Question 14

Fletcher-Munson established the human ear to be the most sensitive at what frequency?

Answer 14

3.15kHz

Question 15

Fletcher-Munson established that as the volume decreases the ear’s response to very low frequency does what?

Answer 15

Decreases

Question 16

What type of frequencies can bend around corners and travel through dense materials?

Answer 16

Low frequencies

Question 17

On a graphic equalizer, a FIXED factory set filter could be found where?

Answer 17

Individual frequency faders

Question 18

On a graphic equalizer, a VARIABLE user-set filter could be found where?

Answer 18

Range switch

Question 19

On a graphic equalizer, a SHELF response curve would be found where?

Answer 19

Lo-Cut control

Question 20

On a graphic equalizer, a PEAK response curve would be found where?

Answer 20

Individual frequency faders

Question 21

What two purposes do graphic equalizers serve in a live sound system?

Answer 21

Tune speakers

Avoid feedback

Question 22

A 1/3 octave graphic equalizer would have how many frequency faders?

Answer 22

31

Question 23

A two-channel graphic equalizer that sets the frequencies of both channels with a single slider is called what?

Answer 23

Stereo

Question 24

The Clip Indicatior Light on a dbx graphic EQ indicates what?

Answer 24

Excessive input level

Question 25

The 4-LED Bar Meter on a dbx graphic EQ indicates what?

Answer 25

Output signal level

Question 26

What approach to equalization is considered Best Practice?

Answer 26

Start by reducing the frequencies you feel are too loud

Question 27

What two purposes do peak limiters play in a live sound system?

Answer 27

Avoid distortion and damage to amps, speakers, and ears. | Reduces output above certain level.

Question 28

What function of a peak limiter is needed to effectively handle a combined mix of vocals and instruments?

Answer 28

Auto attack/release

Question 29

What function of a peak limiter is needed in order to limit only certain frequencies?

Answer 29

Side chain with a graphic EQ

Question 30

What control determines when gain reduction is to begin?

Answer 30

Threshold

Question 31

What control determines how much the gain will be reduced?

Answer 31

Ratio

Question 32

What control sets the amount of signal sent to the amps?

Answer 32

Output

Question 33

What type of compression is the most appropriate for system limiting?

Answer 33

Hardknee

Question 34

What compression ratio is the most appropriate for system limiting?

Answer 34

20:1

Question 35

Every crossover point has to contain what?

Answer 35

High-pass filter | Low-pass filter

Question 36

Sound cutting in and out while music plays at low volume could be the result of what?

Answer 36

A noise gate with the threshold set too high

Question 37

What is a driver?

Answer 37

Vibrating element that changes electrical energy into acoustical