I have a search application like google search and I need to integrate with voice search facility like google voice search. I am looking for a open source extensible search engine that I can use for the same. I have come across Sphinx4 voice recognition engine and decided to use the same. I would prefer Java with Lucene as a search engine. Has anybody done any of such apps and would like to give me some information on where to start.
Well, since you mentioned Google Voice Search: https://github.com/The-Shadow/java-speech-api. It uses the same Speech Recognition Engine. I am sure the rest can be dealt within the Lucene API.