Digital signal processing Questions & Answers

Digital signal processing Questions & Answers 2 types of feedback cancellation: - CORRECT ANSWER - -notch filters: reduce gain in narrow freq. region -phase cancellation: feedback is detected and opposite phase is produced 2 types of notch filters: - CORRECT ANSWER - -Static filter: only way to change the freq. of notch is to reprogram -Active notch filter: HA monitors output for feedback and creates a notch filter at the frequency that it detects 4 binary numbers....8 binary numbers....16 binary numbers can be formed into ___ possible combinations. - CORRECT ANSWER - -16 (2^4) -256 (2^8) -65,536 (2^16) A high amount of quantization enables: - CORRECT ANSWER - -low distortion and high dynamic range -more accuracy of intensity represented by numbers -greater resolution Algorithm - CORRECT ANSWER - -can be thought of as a prescription -a mathematical rule or process to solve a problem -it is a set of mathematical operations performed by the digital processor on the incoming signal to yield the desired solution Aliasing - CORRECT ANSWER - presence of frequencies in the output that are false or "alias" frequencies not present in the input signal, (therefore they are distortion) Anti-aliasing filter is ___ pass. - CORRECT ANSWER - low Benefits of DSP: - CORRECT ANSWER - -feedback suppression -low power consumption -low internal noise -miniaturization -programmability -signal processing complexity Besides anti-aliasing filter, how to help avoid alias frequencies in signal? - CORRECT ANSWER - -sample signal at higher sampling rates than Nyquist frequency Beyond 6 ft. reverberation and the inverse square law come into play so it is best to use ___ ____. - CORRECT ANSWER - remote mics