3. A speech correction apparatus according to claim 2 , wherein the speech-head correcting unit multiplies the average power of the speech to be corrected by Ls/Ln for the time length Ln just after shifting from the silent state to the speech state at the speech head.
3. A speech correction apparatus according to claim 2 , wherein the speech-head correcting unit multiplies the average power of the speech to be corrected by Ls/Ln for the time length Ln just after shifting from the silent state to the speech state at the speech head. 4. A speech correction apparatus according to claim 3 , wherein the speech-head correcting unit sequentially reduces the correction amount of the average power of the speech to be corrected after the time length Ln has passed until the time length Ls passes, with the border between the silent state and the speech state at the speech head being the reference.