9. The system of claim 8 , the computer-readable storage medium having additional instructions stored which, when executed by the processor, cause the processor to perform operations comprising: mixing the speech signal with a second speech signal, to yield a mixed speech signal; and adding the mixed speech signal to the database of reference speech signals.
9. The system of claim 8 , the computer-readable storage medium having additional instructions stored which, when executed by the processor, cause the processor to perform operations comprising: mixing the speech signal with a second speech signal, to yield a mixed speech signal; and adding the mixed speech signal to the database of reference speech signals. 10. The system of claim 9 , wherein the speech signal and the second speech signal are received from the user.