audio signal processing

Audio signal processing involves converting analog signals, like sound waves, into digital formats for transmission and manipulation. This is crucial for high-fidelity communication, minimizing distortion and noise. The process begins with analog-to-digital (A/D) conversion, where continuous analog signals are sampled at regular intervals and assigned discrete numerical values. These values are then mapped into binary sequences (bits) for digital representation. Conversely, digital-to-analog (D/A) conversion is used to transform digital signals back into analog signals, such as when a modem sends computer data over telephone lines. Electromechanical transducers, like microphones, convert sound waves into electrical signals, while loudspeakers convert electrical signals into sound waves. The human ear perceives sound based on frequency (pitch) and intensity (loudness), with the audible range typically from 20 to 20,000 hertz.1234