6461597
Description
Flashcards by Alex Meulenbeld, updated more than 1 year ago
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Created by Alex Meulenbeld
over 7 years ago
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| Question | Answer |
| What is the Fourier Theorem | any complex waveform can be broken down into x number of sine components, each of different frequency, amplitude and phase |
| What is traverse wave motion | a wave in which the particle motion is perpendicular to the direction of wave notion ie. how waves in water move |
| What is longitudinal wave motion | a wave in which the partial motion is in the same direction, or parallel as the wave motion ie. how sound moves |
| What is superposition | when two waveforms are perfectly in phase and the result is they double in amplitude |
| What is constructive/positive interference | relating to superposition it is when two waves are in phase and they increase in amplitude |
| What is destructive/negative interference | relating to superposition it is when two waves are out of phase and they cancel each other out |
| What is a complex wave | a wave that has more then one frequency, the result of multiple sine waves added together |
| what is phase shift | term used to describe one waveforms relationship/location to another and whether they are "in phase" or "out of phase" |
| what is phase angle | physical point on a cycle measured in degrees (one complete cycle = one complete circle) |
| What is attack | the initial "hit" of a certain sound otherwise known as the transient |
| What is decay | the lowering in amplitude from the initial attack to sustain |
| What is sustain | the longest part of a note that occurs between the decay and the final release |
| What is release | the final part of a note that ends the sound to the zero point |
| What is the ADSR envelope | attack, decay, sustain and release |
| What is timbre | the individual sound that an instrument makes ie. a violin and guitar both play a "c note but each have their own timbre |
| What is a chordophone | an instrument that creates it's sound from stretched strings |
| What is a membranophone | an instrument that makes it's sound from a stretched membrane |
| What is a aerophone | an instrument that uses wind through a column to create sound |
| What is an idiophone | an instrument that is made of a naturally resonating/sonorous material ie. wood, metal |
| What is the missing fundamental effect | the phenomena that occurs inside the human ear that can perceive certain sounds (ie. bass) even if it is not present |
| What are harmonically related modes of vibration | an instrument that produces a clear defined pitch consisting of whole number multiples of the fundamental sound ie. guitar |
| What is the fundamental frequency | lowest frequency a vibrating element can vibrate at, also the loudest sound that will be heard when multiples frequencies are played |
| What is the mode of vibration | term used to describe the way a structure vibrates |
| What are the three things all instruments consist of | attack device (pick), vibrating element (string), resonator (guitar body) |
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