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Practice_Exam_1_20011

# Practice_Exam_1_20011 - Dr Fred J Taylor Digital Signal...

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Digital Signal Processing Dr. Fred J. Taylor Exam 1 - 1 EEL 5525 Practice Exam #1 Fall 2011 Lectures 1-7 Name: ____________________________________ ID: _______________________________________ Instructions: Complete the exam on the space provided. When time is called, stop all work and follow the instructions provided. Any work that is not collected when called for will not be graded. The honor system will be strictly enforced. Allowed Open book Open notes Pocket calculators and laptops Figures and tables Internet access to Sakai (only) Disallowed Unauthorized Internet access Cell phones

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Digital Signal Processing Dr. Fred J. Taylor Exam 1 - 2 Q1 : Sampling Theorem and Quantization You are to analyze the audio recording and playback system shown below. The input audio frequency range is f [0, 3.5] kHz. The listener’s hearing range is f [0, 8] kHz. The ADC operates at the programmable sample rate of f s = n8kHz, n an integer. a) What is the lowest sampling frequency f s that will insure that the original audio signal x ( t ) can be (theoretically) reconstructed from its time-series samples x [ k ], without aliasing? b) The room is presumed quiet and you begin recording at a sample rate of f s =8k Sa/s. When played back you hear a 2k Hz “buzzing sound” in the captured signal. What is the expected
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Practice_Exam_1_20011 - Dr Fred J Taylor Digital Signal...

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