Chapter 9

Question 1

In the frequency domain, filters are often described by visualizing the frequencies that are able to “pass” through them.

Answer 1

True

Question 2

Suppose that white noise is used as the input to a filter. Upon examining the output, it is found that frequencies between 400-900 Hz remain and the rest have been attenuated. What shape of filter was used?

Answer 2

bandpass filter

Question 3

A ____ filter can be made by passing a signal in series through a low-pass and a high-pass filter.

A ____ filter can be made by passing a signal in parallel through a low-pass and a high-pass filter and then the results of the two are mixed.

Answer 3

bandpass
notch

Question 4

Suppose that white noise is used as the input to a filter. Upon examining the output, it is found that frequencies between 200-600 Hz remain and the rest have been attenuated. What shape of filter was used?

Answer 4

bandpass filter

Question 5

Suppose we have a band pass filter whose -3dB cut-off points are set at 700Hz and 3000Hz. What is the bandwidth of the filter?

Answer 5

2300

Question 6

An impulse and white noise are similar in the time domain.

Answer 6

false