PURPOSE: To take the interchangeability of a voice standard pattern by correcting a frequency characteristic of plural input devices.

CONSTITUTION: The equipment is provided with a feature extracting part 11 for extracting the feature quantity of a voice with respect to the name inputted by the voice, input devices of two systems of a handset 1 and a hand-free microphone 2, and a correction filter 3 for allowing a frequency characteristic of the handset 1 to be approximate to a frequency characteristic of the hand-free microphone 2. In such a state, an output of the hand-free microphone 2, and an output of the handset 1 passing through the correction filter 3 are connected selectively to an input of the feature extracting part 11. In such a way, frequency characteristics of plural input devices are corrected roughly equally, and also, the input device can be designated selectively, therefore, a drop of a recognition rate is not caused, and the interchangeability by the input device of the standard pattern is taken.