Test 1 Flashcards
1st device to successful record and playback sound? Invented by who? When?
Phonograph invented in 1877 by Thomas Edison
Speed of sound?
1,130 ft/sec
What unit is frequency measure in?
Hz (cycles per second)
Human range of hearing?
20Hz-20kHz
What are the thresholds?
hearing = 0dB feeling = 120dB pain = 140 dB
What is the outer ear called?
pinna
sound wave that doesn’t have an overtone?
sine wave [fundamental] pure tone
Overtones create…
character of sounds
Diffusion
scattering of sound in all directions from reflection off surfaces
Diffraction
Spreading around barriers, bends through openings
Psychoacoustics
Human perception of sound
Reverberation
late reflections
Chronological order of inventions:
telegraph, phonoautograph, telephone, phonograph
Who helped the beginning of the development of the disc?
Emile Berliner
Timbre is determined largely by:
overtones
What is the lowest frequency found in a complex tone, like a note played on a piano…
fundamental
The sensitivity of human hearing in relation to frequency is illustrated through the:
equal-loudness curve
Graphic representation of a sounds energy over time is:
waveform
How fast sound travels through diff mediums
air
How is the time relationship between 2 or more waves measured
degrees
Lowest frequency present in a musical tone
fundamental
All frequencies present other than fundamental are..
overtones
Overtones that are whole number multiples of the fundamental
harmonics
Typical Harmonics (pleasing to the ear)
[even numbers] 2nd, 4th, 6th, etc.
