Patent ID: 6947893

Claim:
An apparatus for transmitting acoustic signals comprising: a synthesizing apparatus for electrically synthesizing an audible sound signal and an insertion signal, and outputting a synthesized sound electrical signal; an acoustic signal outputting apparatus for converting the synthesized sound electrical signal and outputting the acoustic signal externally; an extraction apparatus for extracting said insertion signal based on the synthesized sound electrical signal output from the synthesizing apparatus; a sound collection apparatus for receiving an acoustic signal output from the acoustic signal outputting apparatus and re-converting to a synthesized sound electrical signal, the extraction apparatus extracting said insertion signal using the synthesized sound electrical signal converted by the sound collection apparatus, said insertion signal being a code information corresponding to a character string in a natural language; a machine control section for controlling said machine according to the signal extracted by the extraction apparatus; and a sound generation machine for pronouncing the character string in a natural language corresponding to the code information extracted according to command of the machine control section.