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18 Cards in this Set
- Front
- Back
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What are the 3 types of disturbance?
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frequency, amplitude, transient
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distortion definition
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the shape of a waveform has been altered in some way
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amplitude response
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output amplitudes are plotted as a function of frequency
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frequency distortion
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the waveform has undergone filtering; the frequency of the output is different than the frequency of the input
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the flatter the response in a band-pass filter the less __________ related to that system
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frequency distortion
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systems that alter only the frequency response are called_____.
Why? |
linear systems
because input and output amplitudes are proportional (ex. increase input by 20dB then output will be 20dB higher) |
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The ________ response of a linear system describes the way in which signals that are directed to the input will evidence ________ distortion in the signal observed at the output
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amplitude, frequency
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tone burst
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what happens to the spectrum when the duration of the cycle is shortened. aka sinusoidal pulse
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the width of each band of NRG or lobe in transient distortion, is __________ proportional to duration
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inversely
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transient distortion is a ______ spectrum/function
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continuous
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frequency distortion is a _____function
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linear
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initiating and terminating a signal produces transients. This process is called
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transient distortion
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signals that both have slowly rising and slowly decaying times are characterized by _____ transient distortion
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less
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signals where the amp. rises and decays very quickly have ______ transient distortion
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more
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when can you hear a 'click' noise in transient distortion?
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when the rise or decay is very short
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the rise a fall time of the transient distortion should not be less than _____
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200ms --> stimulus duration
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a system is nonlinear if______
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the instantaneous amps of the input signal do not exceed the limits of linearity of the input-output function of the non-linear system
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amplitude distortion is an example of what
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nonlinear distortion
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