Final Flashcards
Chronological order of these inventions
telegraph, phono autograph, telephone, phonograph
Year 1877 significant in recording because
telephone
1st device to successfully record and playback sound
phonograph
While Edison and other companies competed with rivals for cylinder other competed to create the disc
Emile Berliner
In the acoustic era engineers used ____ to record
horns
Type of music recorded and sold in the acoustic era was determined by..
all of the above
A sound wave is made up of a series of
all of the above
Speed of sound at sea level and 170 degrees farenheit
1,130ft/sec
Hertz is the measurement of
frequency
What is the relationship between 2 tones which one is an octave above the other
frequencies differ by a factor of 2
The unit of measurement for amplitude is …
dB (decibels)
The external structure of the ear
pinae
The threshold of hearing is defined as
0dB
Timbre is determined largely by
overtones
A single pure tone that contains no harmonics or overtones
sine waves
The lowest frequency found in a complex note is
fundamental
Lower frequencies have
long wave lengths
2 identical sound waves that are exactly 180 degrees out of scale will
cancel each other out
As sound bends around an object or surface it is said to be
diffracted
Sensitivity of human hearing in relation to frequency
equal loudness curve
The development of the _______ defined the electrical era of recording
microphone
1st type of microphone
carbon
LP records and 45 RPM singles both had
microgrooves
LP records were originally conceived for recording and computing what musical genre
classical