Answer:
Analog to Digital Conversion (ADC)
Step-by-step explanation:
Sound waves are analog waves as the value of amplitude changes continuously with time. To transmit sound over long distance it is converted into digital signals, which are discrete signals with fixed have fixed set of values which the signal takes with time.
In ADC the Analog Signal is broken down in samples and each sample is assigned a value to make the analog signal discrete and hence digital.