Abstract: A selective message broadcasting system. The system can include fixed storage configured to store pre-recorded audio messages. A digital audio system can be coupled to the fixed storage, and can include playback logic for playing back selected ones of the pre-recorded audio messages. A center frequency modulator can be coupled to the digital audio system and the modulator can be configured to modulate the selected ones of the pre-recorded audio messages about a center frequency in a particular broadcast spectrum. Finally, a frequency band comb distributor can be coupled to the center frequency modulator and configured to replicate the modulated selected ones of the pre-recorded audio messages across a set of frequency transmission channels in the particular broadcast spectrum while maintaining a silence interval between each of the frequency transmission channels in the particular broadcast spectrum. Notably, the broadcast spectrum can include the FM spectrum and the AM spectrum.

Abstract: A selective message broadcasting system. The system can include fixed storage configured to store pre-recorded audio messages. A digital audio system can be coupled to the fixed storage, and can include playback logic for playing back selected ones of the pre-recorded audio messages. A center frequency modulator can be coupled to the digital audio system and the modulator can be configured to modulate the selected ones of the pre-recorded audio messages about a center frequency in a particular broadcast spectrum. Finally, a frequency band comb distributor can be coupled to the center frequency modulator and configured to replicate the modulated selected ones of the pre-recorded audio messages across a set of frequency transmission channels in the particular broadcast spectrum while maintaining a silence interval between each of the frequency transmission channels in the particular broadcast spectrum. Notably, the broadcast spectrum can include the FM spectrum and the AM spectrum.