We are working on a project based on Vehicle tracking system.In one of our module we are using audio(voice) for Public transport system.As if for now we are using filters and a power amplifer We are not able to get good quality audio output with this setup.
Item used: Lpc2132 with MMC card interface ,High pass filter+ Low pass filter+ Audio Amplifier+ Speaker
Requirement:
Good Voice quality annoucement system for Public transport System