Test 1

Question 1

1st device to successful record and playback sound? Invented by who? When?

Answer 1

Phonograph invented in 1877 by Thomas Edison

Question 2

Speed of sound?

Answer 2

1,130 ft/sec

Question 3

What unit is frequency measure in?

Answer 3

Hz (cycles per second)

Question 4

Human range of hearing?

Answer 4

20Hz-20kHz

Question 5

What are the thresholds?

Answer 5

hearing = 0dB
feeling = 120dB
pain = 140 dB

Question 6

What is the outer ear called?

Answer 6

pinna

Question 7

sound wave that doesn’t have an overtone?

Answer 7

sine wave [fundamental] pure tone

Question 8

Overtones create…

Answer 8

character of sounds

Question 9

Diffusion

Answer 9

scattering of sound in all directions from reflection off surfaces

Question 10

Diffraction

Answer 10

Spreading around barriers, bends through openings

Question 11

Psychoacoustics

Answer 11

Human perception of sound

Question 12

Reverberation

Answer 12

late reflections

Question 13

Chronological order of inventions:

Answer 13

telegraph, phonoautograph, telephone, phonograph

Question 14

Who helped the beginning of the development of the disc?

Answer 14

Emile Berliner

Question 15

Timbre is determined largely by:

Answer 15

overtones

Question 16

What is the lowest frequency found in a complex tone, like a note played on a piano…

Answer 16

fundamental

Question 17

The sensitivity of human hearing in relation to frequency is illustrated through the:

Answer 17

equal-loudness curve

Question 18

Graphic representation of a sounds energy over time is:

Answer 18

waveform

Question 19

How fast sound travels through diff mediums

Answer 19

air

Question 20

How is the time relationship between 2 or more waves measured

Answer 20

degrees

Question 21

Lowest frequency present in a musical tone

Answer 21

fundamental

Question 22

All frequencies present other than fundamental are..

Answer 22

overtones

Question 23

Overtones that are whole number multiples of the fundamental

Answer 23

harmonics

Question 24

Typical Harmonics (pleasing to the ear)

Answer 24

[even numbers] 2nd, 4th, 6th, etc.

Question 25

Typical Harmonics (dissonant, harsh)

Answer 25

[odd numbers] 3rd, 5th, 7th

Question 26

Harmonics: Concert A=

Answer 26

440Hz

Question 27

Harmonics are…

Answer 27

880 (2x), 1320 (3x), 1760 (4x)

Question 28

Ear/Brain: responds to pressure variations produced by sound & generates impulses

Answer 28

transducer

Question 29

Ear/Brain: analyzes and interprets impulses

Answer 29

processor

Question 30

Three mechanisms of sound localization:

Answer 30

1) arrival time
2) intensity
3) pinna reflection

Question 31

Amount of time for sound to die away

Answer 31

Reverb Time

Question 32

Who was the American inventor of a single-wire telegraph system and morse code?
(precursor to digital audio)

Answer 32

Samuel F.B. Morse

Question 33

Who invented the phonoautograph?

Answer 33

Edouard-Leon Scott … 1857

Question 34

When was the 1st Commercial Recording Session?

Answer 34

1890