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Although network content access is primarily text-based today, almost all roles of text can be accomplished by voice. Voice-based information retrieval refers to the situation that the user query and/or the content to be retried are in form of voice. This paper tries to compare the voice-based information retrieval with the currently very successful text-based information retrieval, and identifies two major issues in which voice-based information retrieval is far behind: retrieval accuracy and user-system interaction. These two issues are reviewed, analyzed and discussed in detail. It is found that very good approaches have been proposed and very good improvements have been achieved, although there is still a very long way to go. A few successful prototype systems, among many others are presented at the end.