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Comm Diss 311-page12

# Comm Diss 311-page12 - 6dBperoctave, 65.,andthe...

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6 dB per octave, then the ‐6 dB slope of a square wave would be transformed into the ‐12 dB slope of a triangle wave). 65. If a 200‐Hz 50 dB SPL sine wave is passed through a linear system, and the output is 20 dB SPL, we can say that the system attenuates 200‐Hz sine waves by 30 dB. (True) 66. For the same system as above, if a 200‐Hz , 70 dB SPL sound is presented at the input, a 20 dB SPL sound will be present at the output. (No, a linear system would still attenuate by 30 dB, not 50 dB) 67. For a linear system, if we know the response at 200 Hz, we also know the

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• Fall '11
• STAFF
• outputis20dBSPL,wecansaythatthesystemattenuates200Hzsinewavesby30 dB., Nooutputlevelasafunctionofinputlevel, Nooutputlevelasafunctionofinputlevel)

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