One of the top tech stories of the past few days was Google’s introduction of voice search for its iPhone app. For now, the app is not yet available in the iTunes store. The technology behind the new voice search capability is built partly on the same platform as Goog411, but there’s more than that.

Actually, Goog411 is reportedly improving and benefiting from the work done on voice search for the iPhone. Basically, once the app is activated, there are no buttons to push to initiate voice search. The only thing a user has to do is to simply speak the query. Search results will appear as they would if one would have manually entered a query.

Google says it has learned tremendously from its experience with Goog411, but its desktop search query data is also contributing knowledge to the effort.

The system of voice search will be more accurate that it was in the past. As for the removal of the need to push a button to start a search, Google says the query is a bit more natural and intuitive. Having the phone’s receiver closer to the mouth of the person speaking, it will help the system get a better, cleaner input. For now, the voice search will launch in US English, rolling out to other handsets and eventually other countries and languages in the future.

An interesting feature of the app consists of location-awareness. Like Microsoft’s TellMe for Windows Mobile, Google’s Mobile App will search for movies, let’s say, in theaters located in the city where you are while you’re searching. The Google software also supports the iPhone’s virtual keyboard, in case of users who prefer to continue typing in their searches. Furthermore, users can now use voice commands to launch Google applications like Gmail and Google News services.