Module 4 Flashcards
Complex Wave Forms (26 cards)
What waves is any sound wave that is not a sine but it itself is composed of simple sinusoids that can in amplitude ,frequecny , and phase?
- 2 or more sine ways
Complex Waves
If you add sound waves of the same _____ and _______, you will still get a sine wave of a pure tone but higher amplitude
frequency and phase
What waveforms were studied and analyzed by a French mathematician named Joseph Fourier ?
Complex
( Blank) is a complex waveform can be decomposed or analyzed to determine the amplitudes, frequencies, and phases of the each other ·
Fourier Analysis
( Black) is a inusoids in a complex wave have to meet a mathematical requirement
Harmonic relation
What series of waves that can differ in amplitude , , frequency, & phase
-can be derived by a process that is calledFourier’s analysis
Fourier series
T / F
Are simple sound waves consider periodic ?
True
How can a wave be consider complex?
It has 2 or more sine waves
( Blank) is
a wave that repeats itself at regular intervals over time
-can be sinusoidal or complex
Periodic wave
(Blank) is a wave in which individual cycles do not take the same amount of time to occur
Aperiodic waveform
Line ( Power Spectra displays the ______ and the relative _______ of the component sine waves
Frequency and amplitude
How is the Line ( Power Spectra unique ?
Y axis Amplutide
X axis Frequency
taken from a moment in time , no time component or phase
The blue lines are sine waves
All together they are complex waves
( Blank) waves consist of some number of simple sinusoids that are summed
* But the sinusoidal components cannot be selected randomly if the resultant sound wave is to be periodic
Complex periodic
Complex periodic must satisfy a basic mathematical requirement called a
Harmonic relation
What reaction has Each sinusoid in the series must be an integer multiple of the lowest in the series?
Harmonic Relation
Integer multiple of
lowest = 100 Hz: Components are?
100,200,300,400,500
When a harmonic relation exists among frequency components, the series of frequencies is called a ?
harmonic series
All of the sinusoids in the series are called
harmonic
The first harmonic is always the ________ frequency or F0.
Will create a sawtooth waveform
fundemental
What only allowing sertain waveforms to come through?
Bandlimiting
What A complex periodic wave with energy only at the odd harmonics ?
Triangular wave
What waveform is Absent of periodicity . it is usually impossible to predict what the wave will look like from one time to the next. Its vibratory motion is random?
notes : Energy will be present but all over the place . Will not be able to create a line spectra
Aperiodic Waveform
what vibrations that occur as individual events, producing a burst of noise for a short duration ?
- Example: book hitting table
transient
What vibrations that occur continuous
- Example: hissing
random/continuous
