I work an educational facility, and have been asked by a director to look into a solution that would allow us to record classroom activity both visually and audibly, and then allow us to "search" the recordings later for key words/phrases. From what little research I have done to this point, it appears I will need some sort of audio mining software; I am wondering if anybody is familiar with any software solutions availbale that can accomplish this ?

Any help/thoughts/comments/suggestions would be greatly appreciated.