1. An information apparatus that generates a first acoustic model for speech recognition, the information apparatus comprising: a first speech dataset configured to store speech data uttered by low recognition rate speakers; a second speech dataset configured to store speech data uttered by a plurality of speakers; a third speech dataset configured to store ring speech data to be mixed with the speech data of the second speech dataset; a similarity calculating part configured to obtain, for each piece of the speech data in the second speech dataset, a degree of similarity to a given average voice in the first speech dataset; a speech data selecting part configured to record the speech data in the second speech dataset, the degree of similarity of which is within a given selection range, as selected speech data in the third speech dataset; and an acoustic model generating part configured to generate a first acoustic model using the speech data recorded in the second speech dataset and the third speech dataset.