The corpus contains the recordings of 38,718 utterances of American English mobile Keywords speech data which were from 149 speakers(72 males and 77 females). Each speaker was designed to record 1 session, totally 260 utterances in quiet or noisy environments. The total pure recording time is about 19.20 hours, including the leading silence (about 500 milliseconds) and the trailing silence (about 500 milliseconds). The total size of this database is 2.06 GB.