| 1. |
If you wished to have a filter that provides very effective filtering, you would choose which of these options?
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a)
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A first-order passive filter
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b)
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A first-order active filter
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c)
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A 6 dB/octave filter
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d)
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Any of these would be equivalent
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| 2. |
A filter that allows frequencies below 10,000 Hz to go through, but rejects the passage of higher frequencies, would be called
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a)
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A 10,000 Hz high-pass filter
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b)
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A 10,000 hz low-pass filter
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| 3. |
Observe the figure in the picture below. What is its cut-off frequency?
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a)
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5 Hz
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b)
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200 Hz
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c)
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3500 Hz
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d)
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6000 Hz
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Click on image to enlarge
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| 4. |
How many dB per octave is this filter?
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a)
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3
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b)
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6
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c)
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12
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d)
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18
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e)
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36
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| 5. |
Sound level measurement of a 250 Hz signal using the dB A scale
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a)
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Would be higher than if read on the dB C scale
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b)
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Would be lower than if read on the dB C scale
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| 6. |
Observe the dotted curve on the polar plot. A sound coming in from the front (0 degrees) is received as 75 dB SPL. If this same source moves to 270 degrees, the signal will now be __ degrees
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a)
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16 dB SPL
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b)
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59 dB SPL
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c)
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63 dB SPL
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d)
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91 dB SPL
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e)
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No idea!
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Click on image to enlarge
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