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Page Na, Dale, The first step is to get an electrical sianal, The transdu cer (microphone) converts sound, into an eiectrical signal., signal, once, an analog eiectrical, you have, we pass it through an operational amplifier., (op Amp) fo condition the analog signal.or, limit it to protect hext stage., • the anti- aliasing filter is an essential step, in the conversion of analog to digital signal., 2t is a low pass filter. Mñeaning it allows, frequencies upto a certoin threshold to poss., it attenuates all frequencies above +this, threshold these unwanted frequencies make, it difficiult to sample an anatag signal., The nert stage is simple analog to digitat, convertor (ADC), This unit takes in analog, a Stream of binary digits, signals f outputE, • The heart of the system is Signal processor., These days cmos chips to make digital signal, processors. like Cortex M4 we hove DSP, units bailt inside the soc. These proceesor, units have high speed, higb data throughpuls, -and dedicated instruction set., The neet stages are, Of the stages proceding the digital signal, processor., The DAC converts digital signal into, analog slg, The Smoothing filter is another loud-pass, filter that Smooths the output by remo, Sort of the opposite

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Page No, Date, uQwanted iigb fregi Rompanentsom, lost opame is, The olp transducer (speaker) goves olP, Ust, an amplifier., Advantages of digital over Analog signal, processing, Q.2, Digital signal processing operations can be, changed by changing, programmable system ie. it is flexible System., the program in diqital, 2., Better confrol-of accurac, y., 3 digital siqnals ore easily stored on mannetic, media Such as magnetic tape without loss of, quality of, repraduction of signal, Digitat signals con easily transpozted., 4., Digital cirsuits, tole rance, are less sensitive +0, of component values., digital circuits can be reproduced easily, in large quantities at comparatively Lower, Cost., 7., digital System can be cosecadedwithout, any doading problem.