Analogue and Digital Data

Analogue and Digital Data

1. Digital Data

   • Distinct Values
   • Created using 16-bit samples over 44.1KHz
   • Maintains quality over long distances better than analogue
   • Examples
     • the status of a light switch - it can only be 'on' or 'off'
     • the number of cars passing a point in a road
     • the number of people attending a football match
   • DAC
     • Converts Digital Data to Analogue
     • Examples
       • MP3 Player
       • Speakers/Headphones

2. Analogue

   • Vary Continuously
   • Examples
     • the temperature in a greenhouse - it can be any numerical value
     • a person's height
     • sound frequencies
   • Read in the form of 1s and 0s
   • ADC
     • Converts Analogue to Digital Data
     • Examples
       • Microphone
   • Sound is represented through wave forms