Digital Signal Processing Questions & Answers

Digital Signal Processing Questions & Answers Advantages of digital signals - CORRECT ANSWER - - immune to degradation when copied - easier to apply signal processing - easier to store Analogue to Digital Conversion and Reconstruction (ADC) - CORRECT ANSWER - Analog input (sound) ADC (sampler, discrete-time signal, quantizer) DSP (digital input to digital output - compression, wind noise filter, adaptive microphones, etc.) Reconstruction (DAC to low-pass filter) Analog output Analogue vs. Digital Signals - CORRECT ANSWER - Auditory perception = analogue signals stimulating the auditory system Digital signals = electronic equipment Main difference = continuity -analogue signals are continuous and defined at every instant in time -digital signals are discrete and defined at only certain instances in time Block Diagram of a Digital Hearing Aid - CORRECT ANSWER - Mic Pre-amplifier Anti-aliasing filter ADC Microprocessor/Digital Filter DAC Anti-imaging filter Differences between audio file formats - CORRECT ANSWER - WAV and AIFF - An uncompressed digital version of the signal - WAV (microsoft) - AIFF (apple)