Why do digital radios sound clearer and what is the main difference between Analogue and digital signals?

physics Why do digital radios sound clearer and what is the main difference between Analogue and digital signals?
basically, ther are the two types, analogue and digital. Analogue signals are a series of ranging values, and look like this http://images.google.co.uk/images?source鈥?/a>





whereas digital signals only have ons and offs, which look like this http://images.google.co.uk/images?source鈥?/a>





when the signal becomes distorted (e.g. noise is added), it can become harder to read. The digital signal is much easier to read as it is still easy to tell if it is on or off, whereas the analogue signal is harder to read as it can have more values.





This means that on regeneration, the digital signal can maintain it's quiality, but the analogue may sound 'fuzzy'.





this is shown in this picture:





http://www.hometheaternetwork.com/pics/E鈥?/a>





hope this helpsWhy do digital radios sound clearer and what is the main difference between Analogue and digital signals?
I can give you a ';physics'; answer.. but YOU WON'T UNDERSTAND IT.





Analog radio signals are either the traditional aplitude modulation (AM) in which there is a CARRIER with TWO SIDE BANDS or Frequency Modulation (FM) which is a carrer that is MODULATED by a signal.. and it's really not DIRECT FM as it was 30 years or so back but PULSE CODED MODULATION or (PCM).





Digital Modulation is DIGITAL.. It STARTS with an ANALOG signal, then converts it to all ONES AND ZEROS.. it's a data stream just like what you hear when you log your computer on to a dialup line. That DIGITAL information is converted by the receiver to a format that can be decompressed and demodulated and converted into an ANALOG signal that drives the speakers in the radio





LIke I said... YOU WOULDN'T UNDERSTAND IT... but for some reason, you thought there would be a simple answer to an extremely complex technical question that many 'technicians' don't fully understand.